// JavaScript Document

function validate(formCheck) //Function with a parameter representing a form name.
{

	//first name check
    if (formCheck.fname.value =="")
    {
        alert("Please provide your first name"); 
        formCheck.fname.focus();
        return false;
    }
	
	//last name check
    if (formCheck.lname.value =="")
    {
        alert("Please provide your last name"); 
        formCheck.lname.focus();
        return false;
    }	
		
	//email check
   var mail=formCheck.email.value
   
   if (mail.indexOf("@") == -1)
    {
        alert("Please type a valid email");
        formCheck.email.focus();
        return false;
    }
	
    return true;
}


function roll_over(img_name, img_src)
   {
   document[img_name].src = img_src;
   }