var search_tag;
	function search_tag( search_type ) {
	
	document.getElementById("sell").className = "";
	document.getElementById("buy").className = "";
	document.getElementById("company").className = "";
	document.getElementById("hidden_action").value = search_type;
	//alert(document.getElementById("hidden_action").value);
	
	switch (search_type)
	{
		case "sell":
			document.getElementById("sell").className = "Title_Now";
			document.getElementById("search_button").value = "找供应";
			break;
		case "buy":
			document.getElementById("buy").className = "Title_Now";
			document.getElementById("search_button").value = "找采购";
			break;
		case "company":
			document.getElementById("company").className = "Title_Now";
			document.getElementById("search_button").value = "找公司";
			break;
	}

}