Question

I want after keyup on input change background-color input into class box, but in following code change background-color all inputs, i can not change class name. How can fix it without change class name and use id, by closest.

Example: http://jsfiddle.net/S4wL9/

$('input').live('keyup', function (e) {
    e.preventDefault();
    var class_show = '.' + $('.box').closest('.box').find('input').attr('class');
    $(class_show).css('background-color', '#999');
});

Answer 1

Try just changing the CSS property of the element.

$('input').live('keyup', function (e) {
    e.preventDefault();
    var class_show = '.' + $('.box').closest('.box').find('input').css('background-color', '#999');
});