function searchProduct() {
var base = "http://www.jcauto.com.cn/";
//var brandType = document.all.brand.value;
//var seriType = document.all.catena.value;
//var modelType = document.all.model.value;
var brandType = document.getElementById("brand").value;
var seriType = document.getElementById("catena").value;
var modelType = document.getElementById("model").value;

if (brandType.replace(/(^\s+|\s$)/g, "") == "") {
brandType = "0";
}
if (seriType.replace(/(^\s+|\s$)/g, "") == "") {
seriType = "0";
}
if (modelType.replace(/(^\s+|\s$)/g, "") == "") {
modelType = "0";
}

if (brandType == "0" && seriType == "0" && modelType == "0") {
alert("\u8bf7\u9009\u62e9\u67e5\u8be2\u6761\u4ef6");
return false;
} else {
if (brandType != "0" && seriType == "0" && modelType == "0") {
    alert("您选择的品牌类别,请选择相关品牌或者车系!!");
    return false;
}
if ((brandType != "0" && seriType != "0" && modelType == "0") || (brandType == "0" && seriType != "0" && modelType == "0")) {
      
        if(seriType.length==4){
        	 	urlStr=base + "db/brand/" + seriType+".html";
           	window.open(urlStr,"_blank","");
      }else{
        		urlStr= base + "db/series/" + seriType+".html";
    				window.open(urlStr,"_blank","");
  }
}
if ((brandType != "0" && seriType != "0" && modelType != "0") || (brandType != "0" && seriType == "0" && modelType != "0") || (brandType == "0" && seriType == "0" && modelType != "0")) {
      
urlStr =base + "db/model/" + modelType+".html";
 window.open(urlStr,"_blank","");
}
}
}