<td height="30">
                                        <asp:TextBox runat="server" ID="txtBoxsydmName" Width="200"></asp:TextBox>
                                        <input type="hidden" id="labSydmCode" runat="server" />
                                        <img class="HerCss" alt="" onclick="return GetDialog('Info_YZSYDW|sydwbm|dwNamehz|No','txtBoxsydmName','labSydmCode');"
                                            src="../images/search.gif" />
                                    </td>

function GetDialog(data,txtBoxName,labId) {
    var wName;
    var thisStr = "../Select/SelectMain.aspx?GetLie=" + data + "&Radstr=";
    var RadNum = Math.random();
    try {
        wName = window.showModalDialog(thisStr + RadNum, "window", "dialogWidth:350px;DialogHeight=400px;status:no;help:no;resizable:yes;center:yes;");
    }
    catch (e) {
        wName = window.open(thisStr + RadNum, "window", "dialogWidth:300px;DialogHeight=400px;status:no;help:no;resizable:yes;center:yes;");
    }
    if (wName == null) { }
    else {
        var strlist = wName.split('|');
        document.getElementById(txtBoxName).value = strlist[1];
        document.getElementById(labId).value = strlist[0];
     }
}