Question

how to disable a hyperlink ?

Asked by: tech_question

I have a control which by default would be a href once data gets loaded. But if users check one select box I need to disable the hyperlink. How can I disable the link ? I am graying it out by the below code but I need to disable it.
      
if(radPrefMethod[0].checked){
                      objSelect[i].style.color = "blue";
      objSelect[i].style.cursor= "hand";
      }
                      else
      {
                      objSelect[i].style.color = "gray";
      objSelect[i].style.cursor = "text";
      }

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Asked On
2007-02-15 at 06:50:34ID22391364
Tags

hyperlink

,

disable

,

how

Topic

JavaScript

Participating Experts
1
Points
500
Comments
7

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Answers

 

by: ljo8877Posted on 2007-02-15 at 06:56:34ID: 18540492

<a href="url" onclick="return checkIfEnabled()">text</a>

function checkIfEnabled() {
      if(radPrefMethod[0].checked){
              return false;   //don't do default action
      }
      else
      {
      return true; //do default action
      }
}

 

by: tech_questionPosted on 2007-02-15 at 07:01:30ID: 18540538

I must also have added that I have added the following text ,
objSelect[i].style.color = "gray";  objSelect[i].style.cursor = "text";   I still get the blue color on the text. How can I avoid this ?

 

by: tech_questionPosted on 2007-02-15 at 07:06:38ID: 18540591

sorry I mean the text is gray , the still there is underline with blue.

 

by: ljo8877Posted on 2007-02-15 at 11:24:28ID: 18543073

Use a stylesheet and assign a disabled style to the link; for example:

CSS
a.disabled:hover,
a.disabled:visted,
a.disabled:active,
a.disabled {
    color: gray;
    cursor: text;
    text-decoration: none;
}

JS

      if(radPrefMethod[0].checked){
              objSelect[i].className = ""
      }
       else
      {
              objSelect[i].className = "disabled"
      }

function checkIfEnabled() {
      if(radPrefMethod[0].checked){
              return false;   //don't do default action; i.e. don't load href
      }
      else
      {
              return true; //do default action; i.e. load href
      }
}

HTML

<a href="url" onclick="return checkIfEnabled();">text</a>

I am assuming the you have not styled the enabled link. If you did, then assign the appropriate class name.

 

by: tech_questionPosted on 2007-02-15 at 13:40:20ID: 18544195

I tried it in css, it does not work. I also tried  this.style.className but no luck !! one thing that this control is being initialized by reading an xml file - would it matter though ? any ideas why ?

 

by: ljo8877Posted on 2007-02-15 at 14:30:18ID: 18544585

Well, I shooting in the dark not seeing all the relevant code, but if you use CSS to style a link and use the pseudo classes that should result in the desired appearence.

I'm assuming that "objSelect[i]" is a reference to that "a" element that is to look disabled and there are no CSS styles that override the class being assigned. A style that has a more specific selector will override a style with a less specific selector.

The following demonstration code does what you are asking. Make a new page with copy-and-past and try it out.

<html>
    <head>
        <title>test</title>
        <style type="text/css">
            a.disable,
            a.disable:active,
            a.disable:visited,
            a.disable:link,
            a.disable:hover {
                color: #cccccc;
                text-decoration: none;
            }
        </style>
        <script type="text/javascript">
            var linkDisabled = false;
            function checkIfEnabled() {
                if(linkDisabled){
                    return false;
                }
                else
                {
                    return true;
                }
            }
            function disableLink() {
                var t = document.getElementById("test");
                if (linkDisabled) {
                    t.className = "";
                    linkDisabled = false;
                }
                else
                {
                    t.className = "disable";
                    linkDisabled = true;
                }
            }
        </script>
    </head>
    <body>
        <a href="http://www.google.com" onclick="return checkIfEnabled();"
            id="test">long test text</a><br /><br />
        <a href="#nogo" onclick="disableLink();">Disable/Enable above link</a>
    </body>
</html>

This is proof of concept. Your page may have styles that are overriding; for example a style using the link's id will override a style using a class.

 

by: ljo8877Posted on 2007-02-21 at 15:17:04ID: 18583170

I'm glad this helped you. Thanks for the grade.

20120131-EE-VQP-002

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