How to increase width particular textbox newform/edit form in Jquery?

<style>

/* new class created */

.ms-longg

{

width:500px

}

</style>

<script type="text/javascript">

$(document).ready(function(){

//removed existing class 

$('input[title^="State"]').removeClass('ms-long');

//add New class for that textbox

$('input[title^="State"]').addClass('ms-longg');

});

</script>