function OpenPage(url,width,height){
//<![CDATA[ 
windowname='';
width=(width)?width:screen.width/2;
height=(height)?height:screen.height/2;
var screenX = (screen.availWidth/2 - width/2);
var screenY = (screen.availHeight/2 - height/2);
var features= "width=" + width + ",height=" + height +",scrollbars=yes,status=no, menubar=no";
features += ",screenX=" + screenX + ",left=" + screenX;
features += ",screenY=" + screenY + ",top=" + screenY;
var mywin=window.open(url, windowname, features);

} 
//]]>