Guide to activating a CSS attribute for the AJAX tab panel with the use of JavaScript

Currently, I am utilizing the ASP.NET AJAX Tab Container with two tab panels. Each tab panel contains a div tag, and by default, my ActiveTabIndex is set to "0."

Now, I am trying to apply CSS properties to the div tags using JavaScript without causing any post back events. However, I am facing an issue where the CSS property for the first tab panel is not being applied when using the following script. This script works when executed in the code-behind for selected index change, but it results in a postback.

The script I am currently using and need assistance with:

<script type="text/javascript" language="javascript">
           function PanelClick(Sender, e) {
               debugger;
               var CurrentTab = $find('<%=Tab1.ClientID%>');
             if(  Sender._activeTabIndex==0) {
                 debugger
                 document.getElementById('<%=mycustomscroll2.ClientID%>').className = '';
                 document.getElementById('<%=mycustomscroll2.ClientID%>').Enabled = false;
                 document.getElementById('<%=mycustomscroll.ClientID%>').className = 'flexcroll';

             }
             if (Sender._activeTabIndex == 1) {
             debugger
             document.getElementById('<%=mycustomscroll.ClientID%>').className = '';
             document.getElementById('<%=mycustomscroll.ClientID%>').Enabled= false ;
              document.getElementById('<%=mycustomscroll2.ClientID%>').className = 'flexcroll';
             }

           }

       </script>

I am seeking guidance on how to enable CSS properties for the div elements within the tab panel strictly through JavaScript. Any help or suggestions would be greatly appreciated. Thank you.

asp.netjavascript

Answer №1

Check out this handy javascript function that can help with your specific needs:

function HandlePanelClick(Sender, e) {
  var scroll1 = $get('<%=mycustomscroll.ClientID%>');
  var scroll2 = $get('<%=mycustomscroll2.ClientID%>');
  if(Sender._activeTabIndex == 0) {
    scroll1.setAttribute('class', 'flexcroll');
    scroll2.setAttribute('class', '');
  } else if(Sender._activeTabIndex == 1) {
    scroll1.setAttribute('class', '');
    scroll2.setAttribute('class', 'flexcroll');
  }
}

It's important to note that there isn't a direct "enabled" attribute in HTML and JavaScript. The "disabled" attribute is available for elements like button, input, optgroup, option, select and textarea. This attribute is used as follows:

<input type="text" name="txtSomething" id="txtSomething" disabled="disabled">

In JavaScript, you can enable or disable an element by manipulating the "disabled" attribute similarly to how we set the class attribute above:

$get('txtSomething').setAttribute('disabled','disabled'); // disables the input
$get('txtSomething').setAttribute('disabled',''); // enables the input

Keep in mind that this method won't work on elements like <div> and <span> tags.

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