function $(id)
{
	return document.getElementById(id);
}
function typeChange(obj, value)
{
	for(i=1; i<=4; i++)	$("s"+i).className="nav_type";
	obj.className="nav_type nav_type_on";
	$("type").value = value;
	
	var kw = $("key");
	if(value=="merchant"){
	  kw.innerHTML = merchant_hot_key;
	} else if(value=="merchandise"){
	  kw.innerHTML = merchandise_hot_key;
	} else if(value=="member"){
	  kw.innerHTML = member_hot_key;
	}else if(value=="article"){
	  kw.innerHTML = article_hot_key;
	}					 
}
function searchForm()
{
	return $("words").value.replace(/\s/g,"") != "";
}