http://codepen.io/pen/KwNRjQ This should achieve what you want.
$.fn.eqHeights = function(options) {
var defaults = {
child: false ,
parentSelector:null
};
var options = $.extend(defaults, options);
var el = $(this);
if (el.length > 0 && !el.data('eqHeights')) {
$(window).bind('resize.eqHeights', function() {
el.eqHeights();
});
el.data('eqHeights', true);
}
if( options.child && options.child.length > 0 ){
var elmtns = $(options.child, this);
} else {
var elmtns = $(this).children();
}
var prevTop = 0;
var max_height = 0;
var elements = [];
var parentEl;
elmtns.height('auto').each(function() {
if(options.parentSelector && parentEl !== $(this).parents(options.parentSelector).get(0)){
$(elements).height(max_height);
max_height = 0;
prevTop = 0;
elements=[];
parentEl = $(this).parents(options.parentSelector).get(0);
}
var thisTop = this.offsetTop;
if (prevTop > 0 && prevTop != thisTop) {
$(elements).height(max_height);
max_height = $(this).height();
elements = [];
}
max_height = Math.max(max_height, $(this).height());
prevTop = this.offsetTop;
elements.push(this);
});
$(elements).height(max_height);
};