function validate_form ( )
{
	valid = true;
 	var filter= /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	
	 
	

        if ( document.call_back.cb_name.value == "" )
        {
                alert ( "Please fill in the 'Contact Name' box." );
                valid = false;
        }
		else if ( document.call_back.cb_telephone.value == "" )
        {
                alert ( "Please fill in the 'UK Telephone Number' box." );
                valid = false;
        }
		
		else if ( !document.call_back.cb_email.value.match(filter))
		{
				alert ( "Your email address is not valid, it should be something like you@youremail.com!" );
                valid = false;
				}
		
		
		else if ( document.call_back.security_code.value == "" )
        {
                alert ( "Please Verify the Security Code" );
                valid = false;
        }

        return valid;
}
function validate_email ( )
{
	valid2 = true;
 	var filter2= /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	
	if ( !document.web_check.email.value.match(filter2))
		{
				alert ( "Your email address is not valid, it should be something like you@youremail.com!" );
                valid2=false;
		}
		
		return valid2; 
		
		}