var bob=new Array("surname","firstname","email");

function val(){
    for(i=0; i<bob.length; i++){
        if (document.getElementById(bob[i]).value.length < 2){
            alert("Please enter values for all required fields");
            document.getElementById(bob[i]).focus();
            document.getElementById(bob[i]).select();
            return false;
            }
     }
     
     if (! document.getElementById("email").value.match(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,5})+$/)){
        alert("Please enter a correct email address");
        document.getElementById("email").focus();
        document.getElementById("email").select();
        return false;
        }
        
        
}