Looking for JavaScript to enable form submit button after X characters

Validate minimum content

[TheSkepticGuy]

Hi Folks...

Not a JavaScript expert here... but I've been looking for an example script that would validate text-area content by character count, not allowing the form to be submitted until a minimum of X characters had been typed.

Does anyone have any guidance on this one?

Thanks in advance.

[coopster]

Use the string length property of the element value. Something like ...

var el = document.getElementById('myTextArea'); 
if (el.value.length > 75) { 
  // good to go 
} else { 
  // I need more information 
}

[httpwebwitch]

// note that I'm using the $() shortcut here... because I'm lazy

var el = $('myTextArea');
var sb = $('mySubmitButton');

// have the behaviour trigger on keyup for best user responsiveness
// the length condition returns true or false.
// assign that to the "disabled" property of your submit button

el.onkeyup = function(){
sb.disabled = (this.value.length < 75);
}

tada!