var ClickOpen = function(id,openClass,closedClass) {
    var root = document.getElementById(id);
    var button = YAHOO.util.Dom.getFirstChild(root);
    YAHOO.util.Dom.replaceClass(button.parentNode,openClass,closedClass);
    YAHOO.util.Event.addListener(button,"click",function(ev){
	    if(this.parentNode.className==closedClass) {
	        YAHOO.util.Dom.replaceClass(this.parentNode,closedClass,openClass);
        }
	    else {
	        YAHOO.util.Dom.replaceClass(this.parentNode,openClass,closedClass);
        }
	    YAHOO.util.Event.preventDefault(ev);
    });
}