function checkDuplicate(form_id){
	if(document.forms[form_id].elements['email'].value==document.forms[form_id].elements['email2'].value){
		if(document.forms[form_id].elements['name'].value!=''){
			return true;
		} else {
			alert('Please enter your name');
			return false;
		}
	} else {
		alert('Email Addresses do not match.');
		return false;
	}
}
function validate_email(form_id,email) {
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	var address = document.forms[form_id].elements[email].value;
	if(reg.test(address) == false) {
		alert('Invalid Email Address');
		return false;
	} else {
		if(form_id=='add_mailing'){
			return checkDuplicate(form_id);
		} else {
			return true;
		}
   }
}