treeview按需填充更改treenode图像客户端(javascript)

问题描述

我的简单问题如下:

当我按需填充Treeview时，我想在当前正在填充的treenode上显示一种正在进行的图标.

我为此找到了我非常喜欢的解决方案:

My simple problem is the following:

When I populate my Treeview on demand I want to show a sort of an in progress icon on the treenode currently beeing populated.

I Found for that the solution that I btw like very much:

function OnExpandClick(event)
{

    var evt = evt || window.event; // event object
    var obj = evt.target || window.event.srcElement; // event target

    if (obj.tagName.toLowerCase() == "img" || obj.tagName.toLowerCase() == "a") {

        obj.src = "../secure/pictures/loading.gif";
        //selectedNode = document.getElementById(obj.id);
        obj.alt = "Loading ...";
    }
}

这里发生的是，当我单击要扩展的treenode的folderIcon时，它显示了一个小的进度图标..

但是这里是问题所在:当我单击treenode文本时，在

what happens here is that when I click on the folderIcon of the treenode I want to expand.. it shows a small progressing Icon..

BUT here is the problem: WHEN I click on the treenode text, in the

<a ...="" />

标签.我想显示相同的图标..但在这种情况下，请看上面的javascript代码.obj.变量simple不包含src或图像url元素..

我了解到treenode是作为
建立的

tag. I want to show the same icon.. but looking at the javascript code above.. in that scenario the obj. variable simple does not contain a src or image url element..

I learned that a treenode is build up as

<table><tbody><tr>
<td>
<a> treenode name etc</a>
<IMG>
</td>
</tr></tbody></table>

请任何人启发我从A标记开始点击时如何访问IMG ..

任何想法或建议都是最欢迎的！预先感谢.

Please anyone enlighten me on how to acces the IMG when the click is comming from the A tag..

Any ideas or suggestions are most welcome!! Thanks in advance.

推荐答案

如果要更精确，请使用表格的ID

If you want to be more precise use the ID of the table

您可以对图像标签执行相同的操作，也可以从锚点同级进行操作.

You can do the same thing with the image tags, or get to it from the anchor sibling.

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