function swap_class(td,class_name){
	if(document.getElementById || (document.all && !(document.getElementById))) {
		td.className=class_name;
	}
}

function swap_class_id(id,class_name){
	if(document.getElementById || (document.all && !(document.getElementById))) {
		var oElement = document.getElementById(id);
		oElement.className=class_name;
	}
}

function openMenu(subMenuIndex) {
	var prevDisplay = document.getElementById('subMenu_opened_' + subMenuIndex + '_top').className;
	var newDisplay_opened = (prevDisplay == 'contentHidden') ? 'contentVisible' : 'contentHidden';
	var newDisplay_closed = (newDisplay_opened == 'contentHidden') ? 'contentVisible' : 'contentHidden';

	document.getElementById('subMenu_opened_' + subMenuIndex + '_top').className = newDisplay_opened;
	document.getElementById('subMenu_opened_' + subMenuIndex + '_bottom').className = newDisplay_opened;
	document.getElementById('subMenu_closed_' + subMenuIndex).className = newDisplay_closed;
}

function openWin(a, b, c) {
	window.open(a, b, c);
}