function popup(mylink, windowname, width, height)
{
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
href=mylink;
else
href=mylink.href;
param='width='+width+', height='+height+',scrollbars=yes,resizable=yes';
newwindow=window.open(href, windowname, param);
if (window.focus) {newwindow.focus()}
return false;
}