ajax form check

[tuananh87vn]

I'm tolly new to ajax and I want to combine ajax, php and html to build a form where I can check the validity of the input data. There'll be warning right when I finish typing the word, for example "username must be at least 6 characters"

anyone knows how to perform this?

[andho]

u cud use something like this

[HTML]<input name="name" type="text" onkeyup="validate(event);" />[/HTML]

and the javascript function

function validate(e) {
if (this.value.length < 6 ) {
var nameerror = document.getElementById('nameerrordiv');
nameerror.innerHTML = "name should be longer than 6 characters";
}
}

i used a div to show the error message because using alert would be rather trouble some when the user types the first 6 letters.

[acoder]

Just a note that this makes no use of AJAX, but plain old DHTML - nothing more is needed for the task.