function changeLink(linkHref, urlFieldName) {
	var preURL = new String("http://");
	urlField = document.getElementById(urlFieldName);
	if (urlField != null) {
		var urlFieldValue = urlField.value;
		if (urlFieldValue.indexOf( preURL ) == -1) {
			linkHref.href = preURL + urlFieldValue;
		} else {
			linkHref.href = urlFieldValue;
		}
	}
}
function buildLink(linkHref, url) {
	var preURL = new String("http://");
	if (url != null) {
		var urlFieldValue = url;
		if (urlFieldValue.indexOf( preURL ) == -1) {
			linkHref.href = preURL + urlFieldValue;
		} else {
			linkHref.href = urlFieldValue;
		}
	}
}