各位大虾，小弟有个js在火狐里允许不了，还请大家给看下

Question

function changsheng(va)
{
if(va!='0')
{
var a = document.getElementById("ctl00_ContentPlaceHolderMain_sheng").value;
    
    document.getElementById("ctl00_ContentPlaceHolderMain_Hiddentype").value = a;
    
    var f=document.getElementById("ctl00_ContentPlaceHolderMain_city");
    f.options.length=1;
    var url="Handler.ashx?type=sheng&id="+va;
    send_request("GET",url,null,"text",populateClass3);
}
}
function changcity(va)
{
    if(va!='0')
    {
        var b = document.getElementById("ctl00_ContentPlaceHolderMain_city").value;
        document.getElementById("ctl00_ContentPlaceHolderMain_Hiddenjobs").value = b;
    }
}
function populateClass3(){
    var f=document.getElementById("ctl00_ContentPlaceHolderMain_city");
    if(http_request.readyState==4){
        if(http_request.status==200){
        var list=http_request.responseText;
        var classList=list.split("|");
        f.options.length=1;
        for(var i=0;i<classList.length;i++){
        var tmp=classList[i].split(",");
        f.add(new Option(tmp[1],tmp[0]));
        }
        }else{
        alert("您所请求的页面有异常。");
        }
    }
}以上这个代码是做了一个不刷新二级联动的效果

Answer 1

firefox 工具->错误控制台 把错误贴出来

Answer 2

f.add(new option(tmp[1],tmp[0]));  是这句话 给f赋值赋不上，f是个dropdownlist,还请各位大虾给看看 ie下 可以 但是火狐下 就赋不上值

Answer 3

f.options.add(new option(tmp[1],tmp[0]))
试试

Answer 4

option is not defined   firefox 工具->错误控制台 报这个错

Answer 5

firefox不支持new Option，参考下面添加option的操作，兼容IE和Firefoxwhile (obj.selectedIndex > -1){   
         mot = obj.options[obj.selectedIndex].text;   
         mov = obj.options[obj.selectedIndex].value;   
         obj.remove(obj.selectedIndex);   
         var newoption = document.createElement("OPTION");   
         newoption.text = mot;   
         newoption.value = mov;   
         if(Sys.ie) target.add(newoption);   
         if(Sys.firefox) target.appendChild(newoption);   
}  

Answer 6

while (obj.selectedIndex > -1){   
         mot = obj.options[obj.selectedIndex].text;    //选择的text值
         mov = obj.options[obj.selectedIndex].value;   //选择的value值
         obj.remove(obj.selectedIndex);     //移除选择的
         var newoption = document.createElement("OPTION");   //创建一个option节点
         newoption.text = mot;   //设置option节点的text
         newoption.value = mov;   //设置option节点的value
         if(Sys.ie) target.add(newoption);   //向目标select添加option,ie的
         if(Sys.firefox) target.appendChild(newoption);   //向目标select添加option,firefox的
}  

Answer 7

f.text=tmp[0];
                                        f.value=tmp[1];
                                        alert(getOs());
                                        if(getOs()=="MSIE")
                                        { 
                                            target.add(f);   
                                        }
                                        if(getOs()=="Firefox") 
                                        {
                                        target.appendChild(f);   
                                        }我把代码改成上面那样了  但是都不行啊   那个getOs（）是判断浏览器是ie还是火狐的