// JavaScript Document


function setMailAddress(elem, UserPart, HostPart, isLink, InnerText) {
	
	switch (arguments.length) {
		case 3: isLink = true;
		case 4: InnerText = UserPart + '@' + HostPart;
	}
	
	var InsertElem = document.getElementById(elem);
   	if (isLink) {
		// リンクする
		var elemAnchor = document.createElement('a');
		elemAnchor.setAttribute("href", "mailto:" + UserPart + '@' + HostPart);
		elemAnchor.innerHTML = InnerText;
		InsertElem.appendChild(elemAnchor);
	} else {
		// リンクしない
		InsertElem.innerHTML = UserPart + "@" + HostPart;
	}
}