var d = document;
var safari = (navigator.userAgent.toLowerCase().indexOf('safari') != -1) ? true : false;
var gebtn = function(parEl,child){
	return parEl.getElementsByTagName(child);
}

onload = function() {
	if(!d.getElementById || !d.createTextNode) return;
	var ls = gebtn(d,'label');
	for (var i = 0; i < ls.length; i++) {
		var l = ls[i];
		if (l.className.indexOf('label_') == -1) continue;
		var inp = gebtn(l,'input')[0];
		
		if (l.className == 'label_radio') {
			l.className = (safari && inp.checked == true || inp.checked) ? 'label_radio r_on' : 'label_radio r_off';
			l.onclick = turn_radio;
		}
	}
}

var turn_radio = function() {
	var inp = gebtn(this,'input')[0];
	if (this.className == 'label_radio r_off' || inp.checked) {
		var ls = gebtn(this.parentNode,'label');
		for (var i = 0; i < ls.length; i++) {
			var l = ls[i];
			if (l.className.indexOf('label_radio') == -1)  continue;
			l.className = 'label_radio r_off';
		}
		this.className = 'label_radio r_on';
		if (safari) inp.checked = true;
	} else {
		this.className = 'label_radio r_off';
		if (safari) inp.checked = false;
	}
}