var nom=navigator.appName.toLowerCase();
var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_ie = (agt.indexOf("msie") != -1);
var is_ie5up = (is_ie && (is_major >= 4));
var is_nav = (nom.indexOf('netscape')!=-1);
var is_nav4up = (is_nav && (is_major >= 4));
var is_mac = (agt.indexOf("mac")!=-1);
var is_nav4 = (is_nav && (is_major == 4));
var is_gecko = (agt.indexOf('gecko') != -1);
var is_nav6up = (is_nav && (is_major >= 5));

// GECKO REVISION

var is_rev=0
if (is_gecko) {
temp=agt.split("rv:")
is_rev=parseFloat(temp[1])
}

//write your content for only relevant browsers 

  if (is_gecko)   {
  }
  else if (is_nav4)   {
   // document.write() statements to create markup for Navigator 4
  }
  else if (is_ie5up)   {
   // document.write() statements to create markup for Internet Explorer 4  and later versions
  }
  else   {
	window.location = "browserMessage.asp";
  }

var srcCss = "<link href='";
var srcCss2 = ".css' rel='stylesheet' type='text/css' />";
var browserName;
nn2="firefox";
nn3="firefox";
nn4="firefox";
nn6="firefox";
nn="firefox";
ie3="site";
ie4="site";
ie5="site";
ie6="site";
ie7="site";
ie="site";
op3="site";
op5="site";
op="site";
annan="site";
JSv=parseInt(navigator.appVersion)
JSw=navigator.appName
function getBrowser()
{
	if (navigator.userAgent.indexOf("Opera") != -1)
	{
		if (navigator.userAgent.indexOf("Opera/3") != -1)
			browserName = op3;
		else if (navigator.userAgent.indexOf("Opera 5") != -1)
			browserName = op5;
		else
			browserName = op;
	}
	if (JSw=="Netscape")
	{
		if (JSv==2)
			browserName = nn2;
		else if (JSv==3)
			browserName = nn3;
		else if (JSv==4)
			browserName = nn4;
		else if (JSv==5)
			browserName = nn6;
		else
			browserName = nn;
	}
	else if (JSw=="Microsoft Internet Explorer")
	{
		if (JSv==2)
			browserName = ie3;
		else if (navigator.appVersion.indexOf("MSIE 4") != -1)
			browserName = ie4;
		else if (navigator.appVersion.indexOf("MSIE 5") != -1)
			browserName = ie5;
		else if (navigator.appVersion.indexOf("MSIE 6") != -1)
			browserName = ie6;
		else if (navigator.appVersion.indexOf("MSIE 7") != -1)
			browserName = ie7;
		else
			browserName = ie;
	}
	else
		browserName = annan;
srcCss = srcCss + browserName + srcCss2;
return srcCss;
}