Restrict the user to a max limit to enter text in a textarea

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I am restricting the user to enter a max limit(40Char) of characters in a text area.
Calling this below JS function on onKeyUp event of textarea.
But when i copy paste a content which is more than 40chars, not gettinng pop-up(Alert) until i do a keyup/down on the textarea.

Is there a way to get alert without keyup/down after pasting into textarea?
Thanks in advance!

C#

function checkMaxLength(textBox, e, maxLength) {
    if (textBox.value.length > maxLength - 1) {        
        alert("* You have reached max limit ");
        textBox.value = textBox.value.substr(0, maxLength);
    } else {
        alert(maxLength - textBox.value.length + " characters remaining");
    }

I have tried the below approach, It is working fine on IE,Safari,Chrome but not working on Mozilla Firefox, Any thoughts on this?

HTML

<HTML><head></head><body>
<form name="myForm">
Text: <input type="text" name="myText"
 önKeyUp = "fncKeyLength(this);">
</form>
<script>
function fncKeyLength(text){
if (window.event.ctrlKey){
if (window.event.keyCode == 86) {
   alert("<br />The string is this long: " + text.length);
 
}
}}
</script></body></HTML>

Posted 30-Jul-12 3:09am

Donthi Thirupathi Reddy

Updated 30-Jul-12 19:38pm

v3

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Shemeer NS · Answer 1 · 2012-07-30T03:26:00

Solution 1

check this url

copy paste[^]

Posted 30-Jul-12 3:26am

Shemeer NS

Comments

Donthi Thirupathi Reddy 31-Jul-12 1:36am

I have tried the below approach, It is working fine on IE,Safari,Chrome but not working on Mozilla Firefox, Any thoughts on this?

<HTML><head></head><body>
<form name="myForm">
Text: <input type="text" name="myText"
önKeyUp = "fncKeyLength(this);">
</form>
<script>
function fncKeyLength(text){
if (window.event.ctrlKey){
if (window.event.keyCode == 86) {
alert("<br />The string is this long: " + text.length);

}
}}
</script></body></HTML>

Shemeer NS 31-Jul-12 9:20am

In mozilla "window.event.keyCode" won't work.. add this line var code = (event.keyCode) ? event.keyCode : event.which; and use variable code to compare the key...

Donthi Thirupathi Reddy 31-Jul-12 9:24am

Thank you! It really helped me.
It is working fine for ctrl+v, but not if we do mouse right click + paste.
Any help on this?

Shemeer NS 31-Jul-12 11:15am

try https://developer.mozilla.org/en/DOM/element.onpaste