// JavaScript Document

if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ieversion>=8)
  document.write("")
 else if (ieversion>=7)
    document.write("")
 else if (ieversion>=6)
   window.location="alerta.html";
 else if (ieversion>=5)
  document.write("")
}
else
 document.write("")