Question

I have this code applied to a input test type onClick="this.value+='http://'", but I want to modify it so that it only adds http:// the first time the user clicks the input.

Any ideas? Thanks.

Answer 1

The answer to your question is obvious (slightly modified, to prefix text with http://):

onClick="this.value = 'http://' + this.value; this.onclick = '';"

However, this method is error-prone, and ugly. You probably want to force a text to be prefixed with http://. The code will not work if the user navigates to the input field using keys (such as tab).

An improved approach would be:

onfocus="if (this.value.substring(0,6)!=='http://') this.value = 'http://' + this.value;"

Still, depending on your exact application, other methods are even more suitable.