function openFeedback(url){
	var feedbackWidth=600;
	var feedbackHeight=645;

	var xpos = 50;
	var ypos = 50;
	
	var comparewindow=window.open(url, 'feedback','scrollbars=no,status=no,toolbar=no,location=no,directories=no,resizable=no,menubar=no,width='+feedbackWidth+',height='+feedbackHeight+',screenX='+xpos+',screenY='+ypos+',top='+ypos+',left='+xpos);
	comparewindow.focus();
}