var IEstring = "<a href='javascript:window.external.addFavorite"
IEstring += "(location.href,document.title);' title='add to favorites'>Add us to your favourites <strong>Just click here !</strong> <\/a>" ;
var NSstring = "Add us to your Favourites <strong>Just press [Ctrl + D]</strong> ";
var OPstring = "Add us to your Favourites <strong>Just press [Ctrl + T]</strong>";
var OTHstring = "Feel free to bookmark this page!"
var whichString = OTHstring ;
var agt = navigator.userAgent.toLowerCase();
var app = navigator.appName.toLowerCase();
var ieAgent = agt.indexOf('msie');
var nsAgent = app.indexOf('netscape');
var opAgent = app.indexOf('opera');

if (ieAgent!= -1) { 
	whichString = IEstring;
	} else if (nsAgent!= -1){ 
		whichString = NSstring; 
		} else if (opAgent!= -1){
			whichString = OPstring; 
}