function GetPieceSections(obj, districtId, ptext)
{
    objs = $(obj);   
    
    var strpost = "{'districtId':'"+districtId+"'}";
    var ajaxpc = new Ajax(null,"<img src='/Images/loading.gif' /> ","/WebService/WsPieceSection.asmx/GetPieceSections",2,strpost,function(rexm){GetPieceSectionsSuccessCallBack(objs, ptext, rexm)});
    ajaxpc.post();
}

function GetPieceSectionsSuccessCallBack(obj,ptext, rexm){
    var data = eval("(" + rexm + ")");
    obj.options.length = 0;
    var option = new Option("所有片区", ""); 
    obj.options.add(option)
    var j = 0;
    for(var i=0;i<data.length;i++){
        if(ptext==data[i].SectionName)j=i+1;
        var option = new Option(data[i].SectionName, data[i].SectionName); 
        obj.options.add(option)
    }
    //obj.innerHTML = str;
    obj.selectedIndex = j;
}