Question

If I do this:

$("[value='xxx']")

It selects textboxes that were sent from the webserver with a value=xxx.

It won’t select the textboxes that were set xxx by the user at the client side.

On a dropdown selection, if the text matches, I want to hide those textboxes. How do I do this?

Answer 1

$("input, textarea").filter(function(){
    return $(this).val() == 'XXX';  
}).hide();

Use the .filter() function.

Read more: http://api.jquery.com/filter

JSfiddle: http://jsfiddle.net/pmuuM/ (try clicking the button before and after changing the value to XXX)

Or (since the question updated):

$('input, textarea').on('change', function(){
    if(this.value == 'XXX') $(this).hide();
});