Disable and Enable Arrowkeys by javascript

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I have a scenario where first i need to disable keyboard arrow keys and after some processing again Enable it,for this i write this jquery function

JavaScript

function DisableArrowKeys() {
        var ar = new Array(37, 38, 39, 40);
        $(document).keydown(function(e) {
            var key = e.which;
            if ($.inArray(key, ar) > -1) {
                e.preventDefault();
                return false; 
           }
            return true;
        });
    }

this function can disable arrow keys,after some processing i need to enable arrow key for this i made changes in the function like below

JavaScript

function EnableArrowKeys() {
        var ar = new Array(37, 38, 39, 40);
        $(document).keydown(function(e) {
            var key = e.which;
            if ($.inArray(key, ar) > -1) {              
                return true;
            }           
        });
    }

But when we call that function it does not enable arrowkeys.Please advice ...

Posted 18-Sep-11 21:12pm

AmitAshish

Updated 18-Sep-11 21:18pm

m@dhu

v2

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rkthiyagarajan 19-Sep-11 3:15am

Use Pre Tag...

koolprasad2003 19-Sep-11 3:51am

If it is solved make it RESOLVEDm by accepting one of the solution.

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koolprasad2003 · Answer 1 · 2011-09-18T21:45:00

Yes you can disabled them.
37, 38, 39, 40 are the keyCodes for arrow keys.
Paste following code under <Script> tag.

C#

document.onkeydown = function(ev)
{
   var key;
   ev = ev || event;
   key = ev.keyCode;
   if(key == 37 || key == 38 || key == 39 || key == 40)
  {

     ev.cancelBubble = true;
     ev.returnValue = false;
  }

}

Muralikrishna8811 · Answer 2 · 2011-09-18T21:46:00

Hi ,

Here am providing some code for disabling arrow keys try these lines

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="Scripts/jquery-1.4.1-vsdoc.js" type="text/javascript"></script>
    <script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
    <script language ="javascript">
        function disfun() {
            document.onkeydown = function () {
                if (parseInt(event.keyCode) >= 37 || parseInt(event.keyCode) <= 40) {
                    return false;
                }
                else {
                    return true;
                }
            };
        
        }
     </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <input type="button" id="disbtn" value ="disable" onclick ="return disfun()" />
      <input type ="text" id="txtgfg" />
    </div>
    </form>
</body>
</html>

I hope it can work for you also.

All the best

Disable and Enable Arrowkeys by javascript

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