Prevent pressing of a key in a textbox

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I have a WebDateChooser textbox which automatically fills up with the current date when the page loads. I can edit this textbox and enter a custom value date. My problem is that after entering a custom date, if i press Enter key and then click outside the textbox, it reverts back to the default date. But this doesn't occur if I click outside the textbox without pressing the Enter key.

What can be the problem ? And is there any way by which i can nullify the effect of pressing the Enter key in the text box ?

Posted 20-Sep-13 5:35am

Divakar Raj M

Updated 20-Sep-13 5:37am

v2

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-09-20T05:43:00

You cannot prevent pressing any key by the software, quite apparently. :-)

You can make some control ignoring some clicks. For example, this is how to filter out all characters but digits:

HTML

<html>
   <head>
      <script type="text/javascript"><!--
         function filterDigits(eventInstance) { 
            eventInstance = eventInstance || window.event;
                key = eventInstance.keyCode || eventInstance.which;
            if ((47 < key) && (key < 58) || key = 45 || key == 8) {
               return true;
            } else {
               if (eventInstance.preventDefault)
                  eventInstance.preventDefault();
               eventInstance.returnValue = false;
               return false;
            } //if
         } //filterDigits
      --></script>
   </head>
<body>

<input type="text" onkeypress="filterDigits(event)"/>

</body>
</html>

Pay attention that you also have to allow #8 (backspace).

—SA

V.Lorz · Answer 2 · 2013-09-20T08:48:00

Sergey's solution is what you need in this case, but take also a look at this JQuery plugin here http://code.google.com/p/jquery-ui-plugins/wiki/TextInput[^] as it could be usefull for future references.

If you need more details on keypresses processing, this link has also some more implementation details: [^].

Prevent pressing of a key in a textbox

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