function searchProduct() {
var base = "http://www.jcauto.com.cn/";
//var brandType = document.all.brand.value;
//var seriType = document.all.catena.value;
var brandType = document.getElementById("brand").value;
var seriType = document.getElementById("catena").value;
if (brandType.replace(/(^\s+|\s$)/g, "") == "") {
       brandType = "0";
}
if (seriType.replace(/(^\s+|\s$)/g, "") == "") {
       seriType = "0";
}

if (brandType == "0" && seriType == "0") {
alert("\u8bf7\u9009\u62e9\u67e5\u8be2\u6761\u4ef6");
return false;
} else {
if (brandType != "0" && seriType == "0") {
       alert("请选择品牌或者车系");
	   return false;
}
if (brandType != "0" && seriType != "0") {
      
	  if(seriType.length==4){
	       urlStr= base + "db/brand/" + seriType+".html";
	  }else{
	       urlStr= base + "db/series/" + seriType+".html";
	  }
    window.open(urlStr,"_blank","");
	}
}
}