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TextBox MaxLength Validation and Display Remaining Characters

Posted By:Lakhan Pal Garg       Posted Date: October 05, 2009    Points: 10    Category: Javascript    URL: http://www.dotnetspark.com  

Text Box OR Text area max length validation and also display the words remaining.
(1) TextBox or Text Area ID
(2) Label ID where we want to show count of remaining character.
(3) Number of Maximum character that are allowed.

Sample Code:
function CountCharactersGeneral(sourceTextBox, displayControl, maxLength)
if(sourceTextBox != null && displayControl != null)
sourceTextBox = document.getElementById(sourceTextBox);
displayControl = document.getElementById(displayControl);
if(sourceTextBox != null)
var len = sourceTextBox.value.length
if (len<=maxLength)
displayControl.innerHTML = maxLength -len +" Character(s) remaining.";
sourceTextBox.value = sourceTextBox.value.substring(0, maxLength);
return false;

Thanks & Regards
Lakhan pal Garg


Further Readings:


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