function g_url() { var dt=new Date(), u=new String(), s=window.screen; u+='ts='+dt.getTime();
if (window.screen) u+='&scr='+s.width+'x'+s.height+'&colorbit='+s.colorDepth;
if (document.all || document.layers) u+='&java='+navigator.javaEnabled(); 
return u; }