function search(id){
	   var changeimg=document.getElementById("changeimg");
	   var changevalue=document.getElementById("changevalue");
	   if(id=='r2'){
	      changeimg.src="images/guge.gif";
		  changevalue.value="谷歌搜索";
		  var r1=document.getElementById("r1");
		  r1.checked=false;
		  var r3=document.getElementById("r3");
		  r3.checked=false;
		  var r4=document.getElementById("r4");
		  r4.checked=false;

	   }else
	   if(id=='r3'){
	      changeimg.src="images/youdao.gif";
		  changevalue.value="有道搜索";
		  var r1=document.getElementById("r1");
		  r1.checked=false;
		  var r2=document.getElementById("r2");
		  r2.checked=false;
		  var r4=document.getElementById("r4");
		  r4.checked=false;		  
	   }else
	   	   if(id=='r4'){
	      changeimg.src="images/bigou.gif";
		  changevalue.value="比购搜索";
		  var r1=document.getElementById("r1");
		  r1.checked=false;
		  var r2=document.getElementById("r2");
		  r2.checked=false;
		  var r3=document.getElementById("r3");
		  r3.checked=false;		  
	   }else
	   
	   if(id=='r1'){
	      changeimg.src="images/baidu.gif";
		  changevalue.value="百度搜索";
		  var r3=document.getElementById("r3");
		  r3.checked=false;
		  var r2=document.getElementById("r2");
		  r2.checked=false;
		  var r4=document.getElementById("r4");
		  r4.checked=false;		  
	   }
	}

	function check_data(theForm){
		var val = $("#search_name").val();
		if(val == "" ){
			return false;
		}
        var sel_radio = "0";
        sel_radio = $(":radio:checked").val();
        var url;
        if(sel_radio == 1){
             url = "http://www.baidu.com/s?wd="+encodeURIComponent(val);
        }else if(sel_radio == 2){
             url = "http://www.google.com/search?hl=zh-CN&q="+encodeURIComponent(val);
        }else if(sel_radio == 3){
             url = "http://www.youdao.com/search?q="+encodeURIComponent(val)+"&ue=utf8&keyfrom=web.index";
        }else if(sel_radio == 4){
             url = "http://www.google.cn/products?q="+encodeURIComponent(val)+"&hl=zh&aq=f";
        }
        window.open(url);
        return false;
	}