Javascript querySelectorAll返回空节点列表
我有一个ASP.Net页面，有3个文本框和1个radiobuttonlist。4个控件中的每一个都具有Javascript querySelectorAll返回空节点列表,javascript,jquery,Javascript,Jquery,我有一个ASP.Net页面，有3个文本框和1个radiobuttonlist。4个控件中的每一个都具有 class="tabbable" 在其定义中。以下是完整的标记： <%@ Control Language="c#" AutoEventWireup="false" Codebehind="approvalacctprocess.ascx.cs" Inherits="cmc.workflow.ui.ApprovalAcctProcess" TargetSchema="http://sc
class="tabbable"
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="approvalacctprocess.ascx.cs" Inherits="cmc.workflow.ui.ApprovalAcctProcess" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>
<%@ Register tagprefix="CMC" Tagname="ApprovalComments" src="~/workflow\ui\ApprovalComments.ascx" %>
<script src="../../Scripts/jquery-1.4.1.js"></script>
<asp:Panel ID="pnlApprovalAC" CssClass="STDPANEL" HorizontalAlign="Center" Runat="server" Width="550">
<TABLE cols="2" width="520">
<TR>
<TD class="FLDLABEL" style="VERTICAL-ALIGN: top">Client Number</TD>
<TD>
<asp:TextBox id=txtclnum style="VERTICAL-ALIGN: top" Width="300" Runat="server" CssClass="FLDVALUE" TabIndex="0" onchange="MoveNext(this);" Text='<%# Property["clnum"] %>' MaxLength="14" AutoPostBack="True" class="tabbable"></asp:TextBox>
<asp:RegularExpressionValidator id="rxClNum" ValidationExpression="^[0-9]+[	]*$|Clt Number TBD" ErrorMessage="Client Number consists of up to 14 numbers"
ControlToValidate="txtclnum" runat="Server"></asp:RegularExpressionValidator></TD>
<TR>
<TD class="FLDLABEL" style="VERTICAL-ALIGN: top">Matter Number (5-6 digit)</TD>
<TD>
<asp:Label id=lbclnum style="TEXT-ALIGN: right" Width="140" Runat="server" Text='<%# Property["clnum"] %>' Font-Name="verdana" Font-Size="x-small">
</asp:Label>-
<asp:TextBox id=txtmmatter Width="150" Runat="server" CssClass="FLDVALUE" TabIndex="1" Text='<%# Property["mmatter"] %>' MaxLength="6" AutoPostBack="True" class="tabbable"></asp:TextBox>
</TD>
<TR>
<TD colSpan="2">
<HR style="COLOR: gray; TEXT-ALIGN: left" SIZE="1">
</TD>
</TR>
<tr>
<td class="FLDLABEL" style="VERTICAL-ALIGN: top" width="500" colspan="2"><asp:Label runat="server" ID="lbExistingClientQuestion" Text="Is there an Engagement Letter on file for this client?" Visible="false" />
<asp:Label runat="server" ID="lbUDFRetainerLetter" Text='<%# Property["RetainerLetter"] %>' Visible="false" /></td>
</tr>
<TR>
<TD class="FLDLABEL" style="VERTICAL-ALIGN: top" width="500" colSpan="2">Has a
retainer/engagement letter been submitted and approved by Charlotte Fischman?</TD>
</TR>
<TR>
<TD colSpan="2">
<asp:RadioButtonList id="rblRetLtrReturned" TabIndex="2" Runat="server" CssClass="RADIOBUTTONLIST" RepeatDirection="Horizontal" class="tabbable"
RepeatLayout="Table" RepeatColumns="1" width="300" AutoPostBack="True">
<asp:ListItem Value="0">No</asp:ListItem>
<asp:ListItem Value="1">Yes</asp:ListItem>
</asp:RadioButtonList>
<asp:Label id="lblnoretainerltrneeded" Runat="server" CssClass="SMALLNOTE" Text="(This is an existing client and the matter is in an existing area of law. 				 A retainer letter may not be needed.)"
Font-Size="xx-small" Visible="False" ForeColor="red"></asp:Label></TD>
</TR>
<TR>
<TD colSpan="2">
</TD>
</TR>
<TR>
<td class="FLDLABEL" style="VERTICAL-ALIGN: top" colSpan="2" width="500">Reason for Not Submitting an Retainer/Engagement Letter for Approval<SPAN style="FONT-WEIGHT: bold; COLOR: red">
*</SPAN>
<asp:Label runat="server" CssClass="SMALLNOTE" Text="(Required if no retainer letter submitted and not an existing client)" Font-Size="XX-Small" ForeColor="Red" /></td>
</TR>
<TR>
<td colspan="2">
<asp:TextBox Width="500" runat="server" TextMode="MultiLine" TabIndex="3" CssClass="FLDVALUE" ID="txtReason" MaxLength="500" Text='<%# Property["Reason"] %>' AutoPostBack="True" class="tabbable" />
</td>
</TR>
<TR>
<TD colSpan="2">
<HR style="COLOR: gray; TEXT-ALIGN: left" SIZE="1">
</TD>
</TR>
<TR>
<TD class="FLDLABEL" style="VERTICAL-ALIGN: top">Comments</TD>
<TD>
<asp:TextBox id="txtComments" style="VERTICAL-ALIGN: top" Width="300" TabIndex="4" Runat="server" CssClass="FLDVALUE"
MaxLength="450" Rows="5" TextMode="MultiLine" Text='<%# Property["AcctgComment"] %>' AutoPostBack="True" class="tabbable"></asp:TextBox></TD>
</TR>
</TABLE>
<TABLE class="STDPANEL" style="VERTICAL-ALIGN: middle" height="50" width="550">
<TR>
<td align="center">
<input id="btnSaveACProperty" runat="server" name="btnSaveACProperty"
onserverclick="OnSave_Click" type="submit" value="Save Status and Comment">
<input id="btnResetACProperty" runat="server" name="btnResetACProperty"
type="reset" value="Cancel">
</input>
</input>
</td>
<tr>
<td align="left">
<asp:ValidationSummary ID="valsum" runat="server" BorderColor=""
BorderStyle="Solid" BorderWidth="2" CssClass="VALIDATORSUM" DisplayMode="List"
Font-Bold="True" ForeColor="red"
HeaderText=" Some errors occurred in your input. Please correct them:<br> "
ShowMessageBox="True" ShowSummary="True" Width="500" />
</td>
</tr>
</TABLE>
</asp:Panel>
<script type="text/vbscript">
</script>
<script type="text/javascript" lang="javascript">
function MoveNext(ele) {
$(document).ready(function () {
var lastTabIndex = 4;
var currentElementID = ele.id; // ID set by OnFocusIn
var currentElement = document.getElementById(currentElementID);
var curIndex = currentElement.tabIndex; //get current elements tab index
if (curIndex == lastTabIndex) { //if we are on the last tabindex, go back to the beginning
curIndex = 0;
}
var tabbables = document.querySelectorAll("tabbable"); //get all tabbable elements
alert(tabbables.length);
for (var i = 0; i < tabbables.length; i++) { //loop through each element
if (tabbables[i].tabIndex == (curIndex + 1)) { //check the tabindex to see if it's the element we want
tabbables[i].focus(); //if it's the one we want, focus it and exit the loop
break;
}
}
});
}
</script>
这让我找到了正确的控制点，但焦点并没有停留在那个控制点上。如何将焦点放在控件上？该函数将CSS选择器作为其参数，因此，如果您正在查找类为“tabbable”的元素，您将使用
document.queryselectoral（“.tabbable”）document.querySelectorAll(".tabbable")
编辑：进一步澄清一下，不带“.”的queryselector将查找html标记，如
document.querySelectorAll（“tabbable”）document.querySelectorAll（“.tabbable”）当你使用document.getElementsByClassName（“tabbable”）时，它可能会起作用，因此我可以看出如果你过去使用过这种方法，你可能会感到困惑。好吧，我觉得自己像个白痴。只是供其他人将来参考，问题是1）有一个Cssclass分配给这些控件，它覆盖了HTML标记中我的tabbable类；2）一旦我处理了这个问题（见下面的代码），它仍然不起作用，因为（duh）每个控件上都有一个AutoPostBack=true（它们以前都附带了服务器端代码）。既然AutoPostBack为false，我的代码就可以正常工作了。这是：
<script type="text/javascript" lang="javascript">
function MoveNext(currentElement, btnID) {
$(document).ready(function () {
var saveButton = document.getElementById(btnID);
saveButton.disabled = false;
var lastTabIndex = 4;
var curIndex = currentElement.tabIndex; //get current elements tab index
if (curIndex == lastTabIndex) { //if we are on the last tabindex, go back to the beginning
curIndex = 0;
}
var tabbables = document.getElementsByTagName("*"); //get all tabbable elements
for (var i = 0; i < tabbables.length; i++) { //loop through each element
if (tabbables[i].tabIndex != null & tabbables[i].tabIndex == (curIndex + 1)) { //check the tabindex to see if it's the element we want
tabbables[i].focus(); //if it's the one we want, focus it and exit the loop
break;
}
}
});
}
函数MoveNext（currentElement，btnID）{
$（文档）.ready（函数（）{
var saveButton=document.getElementById（btnID）；
saveButton.disabled=false；
var指数=4；
var curIndex=currentElement.tabIndex；//获取当前元素选项卡索引
如果（curIndex==lastTabIndex）{//如果我们在最后一个tabindex上，则返回到开头
curIndex=0；
}
var tabbables=document.getElementsByTagName（“*”）；//获取所有tabbable元素
对于（var i=0；i感谢大家的帮助。您需要调用
document.querySelectorAll（'.tabbable'）querySelectorqueryselectoralquerySelectorAll“tabbable”document.querySelectorAll（'.tabbable'）“tabbable”<script type="text/javascript" lang="javascript">
function MoveNext(currentElement, btnID) {
$(document).ready(function () {
var saveButton = document.getElementById(btnID);
saveButton.disabled = false;
var lastTabIndex = 4;
var curIndex = currentElement.tabIndex; //get current elements tab index
if (curIndex == lastTabIndex) { //if we are on the last tabindex, go back to the beginning
curIndex = 0;
}
var tabbables = document.getElementsByTagName("*"); //get all tabbable elements
for (var i = 0; i < tabbables.length; i++) { //loop through each element
if (tabbables[i].tabIndex != null & tabbables[i].tabIndex == (curIndex + 1)) { //check the tabindex to see if it's the element we want
tabbables[i].focus(); //if it's the one we want, focus it and exit the loop
break;
}
}
});
}