var newWindow=0;
function openWindow(url,width,height) {
	height=height;
	//alert('width:' + width + ' height:'+height);
	x = (640 - width)/2, y = (480 - height)/2;
	if (screen) {
		y = (screen.availHeight - height)/2;
		x = (screen.availWidth - width)/2;
	}
	if (screen.availWidth > 1800) {
		x = ((screen.availWidth/2) - width)/2;
	}
	if(newWindow)newWindow.close();
//	if(newWindow) if(!newWindow.closed) newWindow.close();
	newWindow=window.open(url,'newWindow','copyhistory=no,width='+width+',height='+height+'innerHeight='+height+',innerWidth='+width+',screenX='+x+',screenY='+y+',top='+y+',left='+x);
	if (!newWindow.opener) newWindow.opener = self;
	newWindow.focus();
}
function closeWindow(){
	if(newWindow)newWindow.close();	
}