function validate_form(obj_form) {
	obj_form.email.value = trim ( obj_form.email.value );
	
	if ( obj_form.email.value == "" ) {	
		obj_form.email.focus ();
		alert ( "Email is a required field." );
		return false;
	} else {
		if (!isEmail(obj_form.email.value)) {
			alert("Please provide a valid Email Address.");
			obj_form.email.focus();
			return false;
		}
	}
	
	return true;
}