var browserName=navigator.appName
var browserVer=parseInt(navigator.appVersion);
if (browserName.indexOf ("Microsoft Internet Explorer") != -1 && browserVer <= 6)
{
document.write("<link href=\"ie.css\" rel=\"stylesheet\" type=\"text/css\" />");
}
else {
document.write("<link href=\"styles.css\" rel=\"stylesheet\" type=\"text/css\" />");
}