<span class="ssjt_span" style="width:30px;">省：</span>
                                    <select id="Province" onChange="loadCity();" style="float:left; width:100px;">
                                         <OPTION value="-1">--省份--</OPTION> 
                                    </select>
                                    <span class="ssjt_span" style="width:30px; float:left; padding-left:10px;">市：</span>
                                    <select id="City" style="float:left; width:150px;">
                                         <OPTION value="-1">--城市--</OPTION>
                                    </select>

$.ajax({  
        url: "LoadCity.ashx",
        data: "ParentId="+ParentId+"&Now="+new Date().getTime(),  
        dataType: "json",
        success: function (data) {
            $("#City").empty();
            $.each(data, function (i) {
                if(i==0)$("<option value='" + data[i]["classid"] + "' selected='selected'>" + data[i]["classname"] + "</option>").appendTo("#City");else $("<option value='" + data[i]["classid"] + "'>" + data[i]["classname"] + "</option>").appendTo("#City");
            })
        },
        error: function(msg) {
            window.location.reload();
        }
    });
var CityName = $("#City").find("option:selected").text();
alert(CityName);输出的结果居然是"--城市--"