var myrules = {
		'select' : function(element){
			element.onchange = function(){
				if( element.options[element.selectedIndex].text.split('$')[1].length > 0)
					document.getElementById("price_label").innerHTML = 
						'$'+ element.options[element.selectedIndex].text.split('$')[1];
			}
		}
	};
function onload_cb(){
        if( document.getElementById("price_label").innerHTML == "$0.00" ){
                document.getElementById("price_label").innerHTML = "Varies";
        }
}

	Behaviour.register(myrules);
	Behaviour.addLoadEvent(onload_cb);