JQUERY WINDOW RESIZE FUNCTIONALITY USAGE

<script>
$(document).ready(function(){

var $window = $(window);

function checkWidth() {

var windowsize = $window.width();

if (windowsize < 768) {
//do work for < 768
}
else{
//do work for other size greater then 768
}
}
//initialize for first time check
checkWidth();

//now check on window resize
$(window).resize(checkWidth);


});