document.onkeydown = function(e){

	 	// alert(1)

	 	var keycode = "";

	 	 if(navigator.appName == "Microsoft Internet Explorer")

       {

           keycode = event.keyCode;

           // var realkey = String.fromCharCode(event.keyCode);

       }else{

           keycode = e.which;

           // var realkey = String.fromCharCode(e.which);

       }

       if(keycode == "27"){

       		// alert(27)

       		$.pdialog.closeCurrent()

       }

       // alert("按键码: " + keycode + "字符: " + realkey);

	 }