function init(target_id,url,css){
	try{
		target = document.getElementById(target_id);
		target.onmouseover = function(){
			this.className = "description description_hover "+css;
		}
		target.onmouseout = function(){
			this.className = "description "+css;
		}
		target.onmouseup = function(){
			window.location = url;
		}
	}catch(e){}
}