silverstripe-subsites/javascript/SubsitesTreeDropdownField.js

(function($) {
	$.entwine('ss', function($) {
		$('.TreeDropdownField').entwine({
	subsiteID: function() {
		var subsiteSel = $$('#CopyContentFromID_SubsiteID select')[0];
		if(!subsiteSel) return;
		
		subsiteSel.onchange = (function() {
			this.createTreeNode(true);
			this.ajaxGetTree((function(response) {
				this.newTreeReady(response, true);
				this.updateTreeLabel();
			}).bind(this));
		}).bind(this);
		return subsiteSel.options[subsiteSel.selectedIndex].value;
	},
	
			getRequestParams: function() {
				var name=this.find(':input:hidden').attr('name');
				var obj={};
		
				obj[name+'_SubsiteID']=parseInt(this.subsiteID());
		
				return obj;
	}
		});
	});
})(jQuery);