mail_items = 1;

function addItem() {
    if (mail_items < 4) {
	div=document.getElementById("emails");
	mail_items++;
	if (mail_items > 1)
		document.getElementById("del").style.visibility = '';
	newitem = "<input type='text' name='email_" + mail_items + "' maxlength='80' class='sc_text'>";
	newnode = document.createElement("span");
	newnode.setAttribute('id', 'email_' + mail_items);
	newnode.innerHTML = newitem;
	div.insertBefore(newnode,null);
    }
}

function delItem() {
    if (mail_items > 1) {
	div = document.getElementById("emails");
	elem = document.getElementById('email_' + mail_items);
 	div.removeChild(elem);
	mail_items--;
	if (mail_items <= 1)
		document.getElementById("del").style.visibility = 'hidden';
    }
}

function checkEmail(divId, elem) {
	document.getElementById(divId).style.visibility = 'hidden';
	reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if (!reg.test(elem.value)) {
		document.getElementById(divId).style.visibility = 'visible';
		elem.focus();
		return false;
	}	
	else
		return true;
}