function clickHandler(param, param1, class_) {
var targetId, srcElement, targetElement;
 
	if (class_ == "Otl") {
		targetId = param + "details";
		targetElement = document.all(targetId);
		if (targetElement.style.display == "none") {
		targetElement.style.display = "";
		id = param + "img";
		document.all[id].src = "/pic/minus_ex.gif";
		} else {
		targetElement.style.display = "none"; 
		id = param + "img";
		document.images[id].src = "/pic/plus_ex.gif";
		}  
	}else{
		id = param + "details";
		document.all[id].style.display = "";
		id = param + "img";
		document.images[id].src = "/pic/minus_ex.gif";
	}
}