function init() {
	var elementsToClear = YAHOO.util.Dom.getElementsByClassName('clearDefault');
	YAHOO.util.Event.addListener(elementsToClear,'click',clearDefault);
	YAHOO.util.Event.addListener(elementsToClear,'focus',clearDefault);	
}

YAHOO.util.Event.onDOMReady(init);

function clearDefault(e) {
	if (this.defaultValue==this.value) 
		this.value = ""
}