// JavaScript Document
function changePhoto(idx) {	
		var url = 'ajax_change_ref.php';
		var pars = 'idx='+idx;
		
		var myAjax = new Ajax.Updater(
			'photoArea', 
			url, 
			{
				method: 'get', 
				parameters: pars
				//onLoading: showloading,
				//onComplete: unloadloading
			}
		);
}