function validate(f) {

	if(document.all) {
		e = 'document.all';
	} else {
		e = 'document';
	}

	var errormsg = '';
	var blank = '';
	var i;
	if(f.fname.value=="") {
		blank += "Please fill in your first name\n";
	}

	if(f.lname.value=="") {
		blank += "Please fill in your last name\n";
	}
	
	if(f.phone.value=="") {
		blank += "Please fill in your phone number\n";
	}
	
	if(f.email.value=="") {
		blank += "Please fill in your e-mail address\n";
	}

	if(f.email.value.indexOf('@') < 0) {
		errormsg += 'Please enter a valid email address';		
	}

	var msg = blank + errormsg;
	if(msg != '') {
		alert(msg);
		return false;
	} else {
		return true;
	}
}