// validate email address
	function checkEmail(strEmail) {
    	var hasAt = (strEmail.indexOf("@") >= 0);
		var hasDot = (strEmail.indexOf(".") >= 0);
		
		// Check for email address: look for [@] and [.] 
        if( strEmail + "" == "" ) {
		 	alert('Please enter an email address');	
			return false;
		}
		else if( hasAt &&  hasDot ){
        	return true;
		}
        else {
			alert('The email address given is not valid');
			return false;
		}
    	return true;
	}