function hideDiv(e){
	var div=document.getElementById('search_radio');
	var div_click=document.getElementById('search_submit');
	var target=e?e.target:event.srcElement;
	if(target==div_click){
		div.className='active';
	}
	else if(target!=div){
		div.className='';
	}
}
document.onclick=hideDiv;