function $$(id){return document.getElementById(id);}
function search_ylw()
    {
        var k = escape(document.getElementById("search_k").value);
		if(document.getElementById("search_k").value == "选择分类并填写查找“关键字”")
		{alert("请填写关键字");return;}
		switch(document.getElementById("search_c").value)
		{
			case"请选择" : alert("请选择分类");break;
			case"苗木供应": window.open("http://www.yuanlin.com/B2B/Sell/Search.shtml?KeyWord=" + k,"_blank"); break;
			case"sell": window.open("http://www.yuanlin.com/B2B/Sell/Search.shtml?KeyWord=" + k,"_blank"); break;
			case"buy": window.open("http://www.yuanlin.com/B2B/buy/Search.shtml?KeyWord=" + k,"_blank"); break;
			case"price": window.open("http://mmbj.yuanlin.com?ProductName=" + k,"_blank");break;
			case"资材供应": window.open("http://zc.yuanlin.com/sell.html?&q=" + k,"_blank");break;
			case"苗木报价":window.open("http://mmbj.yuanlin.com?ProductName=" + k,"_blank");break;
			case"资讯": window.open("http://news.yuanlin.com/Search.htm?KeyWords=" + k,"_blank");break;
			case"企业":window.open("http://www.yuanlin.com/114/Show_SearchResult.aspx?ShowMode=0&Province=&City=&Class1Name=&Class2Name=&ph1=86&ph2=&ph3=&product=&post=&KeyWord=" + k,"_blank");break;
		}
    }