datepicker id generation not unique; with patch

Datepicker automatically assigns ids when one is not present. However, it uses new Date().getTime(), which only is granular to the millisecond level. However, calling the datepicker instantiation method on a class, ie, $("div.calpick").datepicker({ selectRange: false });, or such, can easily result in the datepicker trying to assign the same id because it handles more than 1 per millisecond.

This patch creates a .uuid variable in the singleton and assigns its incremented value as an addition to the Date().getTime() call; although I imagine you could probably get rid of the getTime call entirely, but I left it in. I tested this and it worked fine resolving my issue.

Although I am using a personalized bundle, I added a couple lines of context to this diff to make it clear where I changed lines:

*** jquery-ui.js        Tue Aug 19 17:06:08 2008
--- /tmp/jquery-ui-personalized-1.6b.js Fri Aug 15 15:51:54 2008
***************
*** 2366,2370 ****
                var inline = (nodeName == 'div' || nodeName == 'span');
                if (!target.id)
!                       target.id = 'dp' + new Date().getTime() + ++$.datepicker.uuid;
                var inst = this._newInst($(target), inline);
                inst.settings = $.extend({}, settings || {}, inlineSettings || {});
--- 2366,2370 ----
                var inline = (nodeName == 'div' || nodeName == 'span');
                if (!target.id)
!                       target.id = 'dp' + new Date().getTime();
                var inst = this._newInst($(target), inline);
                inst.settings = $.extend({}, settings || {}, inlineSettings || {});
***************
*** 2460,2464 ****
                var inst = this._dialogInst; // internal instance
                if (!inst) {
!                       var id = 'dp' + new Date().getTime() + ++$.datepicker.uuid;
                        this._dialogInput = $('<input type="text" id="' + id +
                                '" size="1" style="position: absolute; top: -100px;"/>');
--- 2460,2464 ----
                var inst = this._dialogInst; // internal instance
                if (!inst) {
!                       var id = 'dp' + new Date().getTime();
                        this._dialogInput = $('<input type="text" id="' + id +
                                '" size="1" style="position: absolute; top: -100px;"/>');
***************
*** 3868,3872 ****
  $.datepicker = new Datepicker(); // singleton instance
  $.datepicker.initialized = false;
- $.datepicker.uuid = 0; // for creating unique identifiers

  })(jQuery);
--- 3868,3871 ----