function openCWin(url,height,width,name) {
   var str="height="+height+",innerHeight="+height;
   str+=",width="+width+",innerWidth="+width;
   if (window.screen) {
     var ah=screen.availHeight-30;
     var aw=screen.availWidth-10;

     var xc=(aw-width)/2;
     var yc=(ah-height)/2;

     str+=",left="+xc+",screenX="+xc;
     str+=",top="+yc+",screenY="+yc;
   }
 
str+=",toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=yes";
   return window.open(url,name,str);
}