function popupCenteredWindow(p_url){
	var top=screen.availHeight/2-280;
	var left=screen.availWidth/2-300;
	window.open(p_url, '_blank', 'width=500, height=500, menubar=yes, scrollbars=yes, resizable=yes, top='+top.toString()+', left='+left.toString());
}

function openpopup(url) {
	var top=screen.availHeight/2-280;
	var left=screen.availWidth/2-300;
	window.open(url, "_blank", "width=375, height=560, scrollbars=yes, resizable=yes, top="+top.toString()+", left="+left.toString());
}