Question: I have both php and javascript in my code. There are links which change javascript variables which are then passed to php via $get. To change the values I'm pretty sure I would have to refresh the page. Where could I put default values such that they load the first time the page does but not on every successive refresh as they would overwrite the values I have already? Thank you!

Answer: 
The `change` event only fires on blur. If you are trying to handle any date selection use the [`select`](http://dev.sencha.com/deploy/ext-3.4.0/docs/source/DateField.html#event-Ext.form.DateField-select) event instead (in ExtJS 3.4).
If you are selecting using calendar icon then add select listener
if you are clearing datefield using backspace keys then add change listener