function chkbx(){
if (navigator.userAgent.indexOf('Opera') > -1) {
	window.scrollTo (0);
} else {
$$('label.check').each(function(e){

	var ec = e.firstChild;
	function check(el){
		var tmp = (el.firstChild.checked)?"_on":"_off";
		return "check "+ec.type + tmp;
	}
	e.className = check(e);
	e.style.cursor = 'pointer';
	ec.style.display = 'none';
	
	e.addEvent('click',function(){
		var chi = this.firstChild;
		if(!chi.checked || chi.type != 'radio')	chi.checked = !chi.checked;
				
		if(chi.type != 'radio'){
			this.className = check(this);
		}
		else{
		$$('label.check').each(function(j){
				if(j.firstChild.type == 'radio') j.className = check(j);
			});
		}
	});
	
	
	if(ec.type == 'radio'){
			e.addEvent('mouseenter',function(){
				e.className = 'check '+ec.type+'_on';
			});
			e.addEvent('mouseleave',function(){
				if(!ec.checked)
					e.className = 'check '+ec.type+'_off';
			});
	}
});
}
}