function bookmarksite(){
var txt = "bookmark this site";
var url = "http://www.unitconverters.net";
var who = "Unit Converter";

var ver = navigator.appName;
var num = parseInt(navigator.appVersion);
if ((ver == "Microsoft Internet Explorer")&&(num >= 4)) {
document.write('<A HREF="javascript:window.external.AddFavorite(url,who);" ');
document.write('onMouseOver=" window.status=');
document.write("txt; return true ");
document.write('"onMouseOut=" window.status=');
document.write("' '; return true ");
document.write('">'+ txt + '</a>');
}else{
	txt = "Press Ctrl+D to Bookmark";
	document.write(txt);
}
}