function centerWin(filename,width,height,name)
{
   var x=(screen.availWidth-width)/2;
   var y=(screen.availHeight-height)/2-50;
   name='win'
   newWin=window.open(filename, name,"width=10,height=10, menubar=1, scrollbars=yes");
   newWin.moveTo(x,y);
   newWin.resizeTo(width,height);
}