Question

Is there any way to append a text to input field?

So lets say instead of:

<input type="text" id="val" name="val" value="http://" style="width: 140px;" />

with “http://” already written, have a “http://” added automatically when someone types an address, and if someone types full url “http://www.****.com” the http should not be added so it’s not doubled.

Any one has any ideas? I can’t use php.

Answer 1

Why not just add the http:// if it is missing?

var input = document.getElementById('val').value;

if (input.search('http://') === -1) {
    input = 'http://' + input;
}

edit: if you need to allow https also, change the search to a regex:

if (input.search(/https?:\/\//) === -1) {

http://jsfiddle.net/jbabey/Bt67X/