function openWindow(url,w,h) {
    var width=780;
    var height=660;
    if(w && w>0)
        width=w;
    if(h && h>0)
        height=h;
     var availheight=((screen.availHeight-height)/2);
	 var availwidth=((screen.availWidth-width)/2);
    winStats='resizable=yes,toolbar=no,status=no,location=no,directories=no,menubar=no,';
	winStats+='scrollbars=yes,width='+width+',height='+height;
	winStats+=',left='+availwidth+',top='+availheight;
	if (navigator.appName.indexOf("Microsoft")>=0) {
		winStats+=',left='+availwidth+',top='+availheight;
	}else{
		winStats+=',screenX='+availwidth+',screenY='+availheight;
	}
	floater=window.open(url,"",winStats)
}