function getid(id){return document.getElementById(id);}
function gettag(tag,obj){if(obj){return obj.getElementsByTagName(tag)}else{return document.getElementsByTagName(tag)}}
function addLoadEvent(func){var oldonload=window.onload;if(typeof window.onload!="function"){window.onload=func;}else{window.onload=function(){oldonload();func();}};}
function radio_style(){
	if(gettag("input")){
	var r=gettag("input");
	function select_element(obj,type){
	obj.parentNode.style.background="url(input_style.gif) no-repeat -15px 0px";
	if(obj.type=="checkbox"){obj.parentNode.style.background="url(input_style.gif) no-repeat -15px -15px";}
	if(type){obj.parentNode.style.background="url(input_style.gif) no-repeat 0px 0px";if(obj.type=="checkbox"){obj.parentNode.style.background="url(input_style.gif) no-repeat 0px -15px";}}
	}
	for(var i=0;i<r.length;i++){
		if(r[i].type=="radio"||r[i].type=="checkbox"){
			r[i].style.opacity=0;r[i].style.filter="alpha(opacity=0)";
			r[i].onclick=function(){select_element(this);unfocus();}
			if(r[i].checked==true){select_element(r[i]);}else{select_element(r[i],1);}
			}
		}	
	function unfocus(){
		for(var i=0;i<r.length;i++){
			if(r[i].type=="radio"||r[i].type=="checkbox"){if(r[i].checked==false){select_element(r[i],1)}}
			}
		}
	}
}
addLoadEvent(radio_style);