// Adds a class focus to input text when focused
function focusfix(selector, className) {
$(selector).focus(function() {
$(this).addClass(className);
});
// Removes class when focus is lost
$(selector).blur(function() {
$(this).removeClass(className);
});
}

jQuery(document).ready(function($) {
focusfix('input', 'focus');
});

jQuery(document).ready(function($) {
focusfix('textarea', 'focus');
});