// Set true or false for callback popup
var dothepopper = 'false';

function popper() {
	if (dothepopper == 'true') {
		var h; var w; var t; var l;
		w = 400;
		h = 320;
		t = (screen.height-h)/2;
		l = (screen.width-w)/2;
		var popwin = window.open('callback.do','','width='+ w +',height='+ h +',top='+ t +',left='+ l +',location=no, statusbar=no, directories=no, resizable=no, menubar=no, toolbar=no, scrollbars=no');
		if (popwin != null) {
			popwin.focus();
		}
	}
}

window.onunload=popper;