This little script hels you controle heights on objects in responsive designs.

Responsive Height Fixer

var highest = 0;
function sortNumber(a,b)    {
    return a - b;
}

function maxHeight() {
    var heights = new Array();
    $('.fixheight>li').each(function(){
        $(this).css('height', 'auto');
        heights.push($(this).height());
        heights = heights.sort(sortNumber).reverse();
    });        
        highest = heights[0]; 
    $('.fixheight>li').each(function(){
        $(this).css('height', highest);
    });

}

$(document).ready(function() {
    maxHeight();
})

$(window).resize(maxHeight);