function leftSearch(){
	var s=document.left_search.stype;   
	var aa=s.options[s.selectedIndex].value;
	//alert(aa);
	switch(aa){
		case '1':
		//alert(aa);
		document.left_search.action="product.php";
		break;
		case '2':
		document.left_search.action="article.php";
		break;
		case '3':
		document.left_search.action="konwledge_class.php";
		break;
		case '4':
		document.left_search.action="article.php?class_1_id=5";
		break;
	}
	//alert(document.left_search.action);
}


function top_menu(id){
	for(var i=1;i<=4;i++){
		if(i==id){
			document.getElementById("top_menu_"+i).className='top_menu_bg_2';
			document.getElementById("top_menu_sub_"+i).className='is_hidden_2';	
		}else{
			document.getElementById("top_menu_"+i).className='top_menu_bg_1';
			document.getElementById("top_menu_sub_"+i).className='is_hidden_1';	
		}
	}
}