function checksearch(formId)
{
	 var form = document.getElementById(formId);
	 var radio = document.getElementsByName('radio');
	  var key = document.getElementById('kw');
	  if(trim(key.value)=='' || key.value=='请输入产品名称' || key.value=='请输入公司名称')
	  {
		  alert("请输入关键字");
		  key.focus();
		  return false;
	  }
    if　(radio[0].checked == true)
    {
        form.action = "/info/search.html";
    }
    else if (radio[1].checked == true)
    {
        form.action = "/price/search.html";
       
    }
	else if (radio[2].checked == true)
    {
        form.action = "/company/search.html";
    }
	 else if (radio[3].checked == true)
    {
        form.action = "/news/search.html";
    }
	}

function trim(str){
	        var sStr = new String(str);
	        sStr = sStr.replace(/(^\s*)|(\s*$)/,"");
	        return sStr;
        }