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)
document.write("");
else if (ieversion>=5)
document.write("You're using IE5.x")
}
else
document.write("");