function edInsertMp3(myField, i, defaultValue) {
	if (!defaultValue) {
		defaultValue = 'http://';
	}
	if (!edCheckOpenTags(i)) {
		var URL = prompt('Enter the URL' ,defaultValue);
		var track = prompt('Enter artist / track information');
		if (URL) {
			edButtons[i].tagStart = '<pt:mp3player what="' + URL + '" track="' + track + '" />';
			edInsertTag(myField, i);
		}
	}
	else {
		edInsertTag(myField, i);
	}
}