2 the script only works on "input [type=text]"
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3 http://teddevito.com/demos/calendar.php
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6 // don't declare anything out here in the global namespace
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8 (function($) { // create private scope (inside you can use $ instead of jQuery)
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10 // functions and vars declared here are effectively 'singletons'. there will be only a single
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11 // instance of them. so this is a good place to declare any immutable items or stateless
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12 // functions. for example:
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14 var today = new Date(); // used in defaults
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15 var months = 'January,February,March,April,May,June,July,August,September,October,November,December'.split(',');
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16 var monthlengths = '31,28,31,30,31,30,31,31,30,31,30,31'.split(',');
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17 var dateRegEx = /^\d{1,2}\/\d{1,2}\/\d{2}|\d{4}$/;
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18 var yearRegEx = /^\d{4,4}$/;
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20 // next, declare the plugin function
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21 $.fn.simpleDatepicker = function(options) {
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23 // functions and vars declared here are created each time your plugn function is invoked
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25 // you could probably refactor your 'build', 'load_month', etc, functions to be passed
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26 // the DOM element from below
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28 var opts = jQuery.extend({}, jQuery.fn.simpleDatepicker.defaults, options);
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30 // replaces a date string with a date object in opts.startdate and opts.enddate, if one exists
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31 // populates two new properties with a ready-to-use year: opts.startyear and opts.endyear
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34 /** extracts and setup a valid year range from the opts object **/
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35 function setupYearRange () {
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37 var startyear, endyear;
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38 if (opts.startdate.constructor == Date) {
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39 startyear = opts.startdate.getFullYear();
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40 } else if (opts.startdate) {
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41 if (yearRegEx.test(opts.startdate)) {
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42 startyear = opts.startdate;
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43 } else if (dateRegEx.test(opts.startdate)) {
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44 opts.startdate = new Date(opts.startdate);
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45 startyear = opts.startdate.getFullYear();
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47 startyear = today.getFullYear();
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50 startyear = today.getFullYear();
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52 opts.startyear = startyear;
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54 if (opts.enddate.constructor == Date) {
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55 endyear = opts.enddate.getFullYear();
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56 } else if (opts.enddate) {
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57 if (yearRegEx.test(opts.enddate)) {
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58 endyear = opts.enddate;
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59 } else if (dateRegEx.test(opts.enddate)) {
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60 opts.enddate = new Date(opts.enddate);
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61 endyear = opts.enddate.getFullYear();
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63 endyear = today.getFullYear();
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66 endyear = today.getFullYear();
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68 opts.endyear = endyear;
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71 /** HTML factory for the actual datepicker table element **/
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72 // has to read the year range so it can setup the correct years in our HTML <select>
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73 function newDatepickerHTML () {
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77 // process year range into an array
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78 for (var i = 0; i <= opts.endyear - opts.startyear; i ++) years[i] = opts.startyear + i;
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80 // build the table structure
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81 var table = jQuery('<table class="datepicker" cellpadding="0" cellspacing="0"></table>');
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82 table.append('<thead></thead>');
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83 table.append('<tfoot></tfoot>');
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84 table.append('<tbody></tbody>');
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86 // month select field
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87 var monthselect = '<select name="month">';
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88 for (var i in months) monthselect += '<option value="'+i+'">'+months[i]+'</option>';
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89 monthselect += '</select>';
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91 // year select field
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92 var yearselect = '<select name="year">';
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93 for (var i in years) yearselect += '<option>'+years[i]+'</option>';
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94 yearselect += '</select>';
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96 jQuery("thead",table).append('<tr class="controls"><th colspan="7"><span class="prevMonth">«</span> '+monthselect+yearselect+' <span class="nextMonth">»</span></th></tr>');
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97 jQuery("thead",table).append('<tr class="days"><th>S</th><th>M</th><th>T</th><th>W</th><th>T</th><th>F</th><th>S</th></tr>');
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98 jQuery("tfoot",table).append('<tr><td colspan="2"><span class="today">today</span></td><td colspan="3"> </td><td colspan="2"><span class="close">close</span></td></tr>');
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99 for (var i = 0; i < 6; i++) jQuery("tbody",table).append('<tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>');
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103 /** get the real position of the input (well, anything really) **/
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104 //http://www.quirksmode.org/js/findpos.html
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105 function findPosition (obj) {
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106 var curleft = curtop = 0;
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107 if (obj.offsetParent) {
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109 curleft += obj.offsetLeft;
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110 curtop += obj.offsetTop;
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111 } while (obj = obj.offsetParent);
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112 return [curleft,curtop];
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118 /** load the initial date and handle all date-navigation **/
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119 // initial calendar load (e is null)
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120 // prevMonth & nextMonth buttons
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121 // onchange for the select fields
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122 function loadMonth (e, el, datepicker, chosendate) {
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124 // reference our years for the nextMonth and prevMonth buttons
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125 var mo = jQuery("select[name=month]", datepicker).get(0).selectedIndex;
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126 var yr = jQuery("select[name=year]", datepicker).get(0).selectedIndex;
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127 var yrs = jQuery("select[name=year] option", datepicker).get().length;
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129 // first try to process buttons that may change the month we're on
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130 if (e && jQuery(e.target).hasClass('prevMonth')) {
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131 if (0 == mo && yr) {
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133 jQuery("select[name=month]", datepicker).get(0).selectedIndex = 11;
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134 jQuery("select[name=year]", datepicker).get(0).selectedIndex = yr;
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137 jQuery("select[name=month]", datepicker).get(0).selectedIndex = mo;
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139 } else if (e && jQuery(e.target).hasClass('nextMonth')) {
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140 if (11 == mo && yr + 1 < yrs) {
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142 jQuery("select[name=month]", datepicker).get(0).selectedIndex = 0;
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143 jQuery("select[name=year]", datepicker).get(0).selectedIndex = yr;
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146 jQuery("select[name=month]", datepicker).get(0).selectedIndex = mo;
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150 // maybe hide buttons
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151 if (0 == mo && !yr) jQuery("span.prevMonth", datepicker).hide();
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152 else jQuery("span.prevMonth", datepicker).show();
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153 if (yr + 1 == yrs && 11 == mo) jQuery("span.nextMonth", datepicker).hide();
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154 else jQuery("span.nextMonth", datepicker).show();
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156 // clear the old cells
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157 var cells = jQuery("tbody td", datepicker).unbind().empty().removeClass('date');
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159 // figure out what month and year to load
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160 var m = jQuery("select[name=month]", datepicker).val();
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161 var y = jQuery("select[name=year]", datepicker).val();
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162 var d = new Date(y, m, 1);
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163 var startindex = d.getDay();
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164 var numdays = monthlengths[m];
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166 // http://en.wikipedia.org/wiki/Leap_year
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167 if (1 == m && ((y%4 == 0 && y%100 != 0) || y%400 == 0)) numdays = 29;
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169 // test for end dates (instead of just a year range)
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170 if (opts.startdate.constructor == Date) {
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171 var startMonth = opts.startdate.getMonth();
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172 var startDate = opts.startdate.getDate();
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174 if (opts.enddate.constructor == Date) {
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175 var endMonth = opts.enddate.getMonth();
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176 var endDate = opts.enddate.getDate();
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179 // walk through the index and populate each cell, binding events too
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180 for (var i = 0; i < numdays; i++) {
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182 var cell = jQuery(cells.get(i+startindex)).removeClass('chosen');
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184 // test that the date falls within a range, if we have a range
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186 (yr || ((!startDate && !startMonth) || ((i+1 >= startDate && mo == startMonth) || mo > startMonth))) &&
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187 (yr + 1 < yrs || ((!endDate && !endMonth) || ((i+1 <= endDate && mo == endMonth) || mo < endMonth)))) {
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193 function () { jQuery(this).addClass('over'); },
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194 function () { jQuery(this).removeClass('over'); })
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195 .click(function () {
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196 var chosenDateObj = new Date(jQuery("select[name=year]", datepicker).val(), jQuery("select[name=month]", datepicker).val(), jQuery(this).text());
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197 closeIt(el, datepicker, chosenDateObj);
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200 // highlight the previous chosen date
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201 if (i+1 == chosendate.getDate() && m == chosendate.getMonth() && y == chosendate.getFullYear()) cell.addClass('chosen');
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206 /** closes the datepicker **/
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207 // sets the currently matched input element's value to the date, if one is available
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208 // remove the table element from the DOM
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209 // indicate that there is no datepicker for the currently matched input element
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210 function closeIt (el, datepicker, dateObj) {
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211 if (dateObj && dateObj.constructor == Date)
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212 el.val(jQuery.fn.simpleDatepicker.formatOutput(dateObj));
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213 datepicker.remove();
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215 jQuery.data(el.get(0), "simpleDatepicker", { hasDatepicker : false });
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218 // iterate the matched nodeset
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219 return this.each(function() {
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221 // functions and vars declared here are created for each matched element. so if
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222 // your functions need to manage or access per-node state you can defined them
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223 // here and use $this to get at the DOM element
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225 if ( jQuery(this).is('input') && 'text' == jQuery(this).attr('type')) {
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228 jQuery.data(jQuery(this).get(0), "simpleDatepicker", { hasDatepicker : false });
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230 // open a datepicker on the click event
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231 jQuery(this).click(function (ev) {
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233 var $this = jQuery(ev.target);
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235 if (false == jQuery.data($this.get(0), "simpleDatepicker").hasDatepicker) {
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237 // store data telling us there is already a datepicker
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238 jQuery.data($this.get(0), "simpleDatepicker", { hasDatepicker : true });
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240 // validate the form's initial content for a date
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241 var initialDate = $this.val();
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243 if (initialDate && dateRegEx.test(initialDate)) {
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244 var chosendate = new Date(initialDate);
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245 } else if (opts.chosendate.constructor == Date) {
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246 var chosendate = opts.chosendate;
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247 } else if (opts.chosendate) {
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248 var chosendate = new Date(opts.chosendate);
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250 var chosendate = today;
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253 // insert the datepicker in the DOM
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254 datepicker = newDatepickerHTML();
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255 jQuery("body").prepend(datepicker);
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257 // position the datepicker
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258 var elPos = findPosition($this.get(0));
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259 var x = (parseInt(opts.x) ? parseInt(opts.x) : 0) + elPos[0];
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260 var y = (parseInt(opts.y) ? parseInt(opts.y) : 0) + elPos[1];
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261 jQuery(datepicker).css({ position: 'absolute', left: x, top: y });
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263 // bind events to the table controls
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264 jQuery("span", datepicker).css("cursor","pointer");
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265 jQuery("select", datepicker).bind('change', function () { loadMonth (null, $this, datepicker, chosendate); });
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266 jQuery("span.prevMonth", datepicker).click(function (e) { loadMonth (e, $this, datepicker, chosendate); });
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267 jQuery("span.nextMonth", datepicker).click(function (e) { loadMonth (e, $this, datepicker, chosendate); });
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268 jQuery("span.today", datepicker).click(function () { closeIt($this, datepicker, new Date()); });
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269 jQuery("span.close", datepicker).click(function () { closeIt($this, datepicker); });
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271 // set the initial values for the month and year select fields
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272 // and load the first month
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273 jQuery("select[name=month]", datepicker).get(0).selectedIndex = chosendate.getMonth();
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274 jQuery("select[name=year]", datepicker).get(0).selectedIndex = Math.max(0, chosendate.getFullYear() - opts.startyear);
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275 loadMonth(null, $this, datepicker, chosendate);
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285 // finally, I like to expose default plugin options as public so they can be manipulated. one
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286 // way to do this is to add a property to the already-public plugin fn
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288 jQuery.fn.simpleDatepicker.formatOutput = function (dateObj) {
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289 return (dateObj.getMonth() + 1) + "/" + dateObj.getDate() + "/" + dateObj.getFullYear();
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292 jQuery.fn.simpleDatepicker.defaults = {
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293 // date string matching /^\d{1,2}\/\d{1,2}\/\d{2}|\d{4}$/
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294 chosendate : today,
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296 // date string matching /^\d{1,2}\/\d{1,2}\/\d{2}|\d{4}$/
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297 // or four digit year
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298 startdate : today.getFullYear(),
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299 enddate : today.getFullYear() + 1,
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301 // offset from the top left corner of the input element
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302 x : 1, // must be in px
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303 y : 18 // must be in px
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309 $(document).ready(function(){
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310 $('#date_first').simpleDatepicker({startdate: 2005, enddate: 2100});
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311 $('#date_second').simpleDatepicker({startdate: 2005, enddate: 2100});
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313 $('#date_filter').change(function(){
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314 var show = $(this).val() == 'between' ? 'inline' : 'none';
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315 $('#date_second').css('display', show);
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316 $('#date_and').css('display', show);
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