Sometimes you need to change something depending on the browser size. Often this means that you’ll need to check for the browser being resized too… To do this you use:

window.onresize = nameOfAFunction;

For an example, make sure you have a <div> with an id of ‘footer’, with a <p> tag inside and try the following:

function checkPageDims(){
    var pageW = $(window).width();
    var pageH = $(window).height();
    $('#footer p').html('w:'+pageW+', h:'+pageH);
}

Then below type:

window.onresize = checkPageDims;