// Detect Internet Explorer browser and print warning if version is older than 6.x
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ 
 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
 //document.write("version is " + ieversion + "<br>");
 if (ieversion>6) {
 } else if (ieversion>5.5) {
   document.write("&nbsp;");
 } else if (ieversion>5) {
   document.write("<b><i><font color=\"crimson\" size=\"3\">Please upgrade to IE version 7 (or later) for proper page formatting</font></b></i><br><a href=\"http://www.microsoft.com/windows/downloads/ie/getitnow.mspx\"><font size=\"4\">Download IE7 here...</font></a>");
 }
}