var urlAddress = "http://www.CarInsurances.co.uk"; 
var pageName = "CarInsurances.co.uk - Car Insurances UK"; 

function fav() 
{ 
if (window.external) 
{ 
window.external.AddFavorite(urlAddress,pageName) 
} else 
{ 
alert("Sorry! Your browser doesn't support this function."); 
} 
}