function validate_form( )
{
	if ( document.form1.subject.value == "" )
    {
        document.form1.subject.focus();
		alert ( "Please fill in the 'Subject'." );
       return false;
    }
   	else if ( document.form1.body.value == "" )
    {
        document.form1.body.focus();
		alert ( "Please fill in the 'Message'." );
       return false;
    }
    else if ( document.form1.username.value == "" )
    {
        document.form1.username.focus();
		alert ( "Please fill in the 'Your Name'." );
       return false;
    }
   
}