jQuery.fn.equalCols = function(){ //Array Sorter var sortNumber = function(a,b){return b - a;}; var heights = []; //Push each height into an array $(this).each(function(){ heights.push($(this).height()); }); heights.sort(sortNumber); var maxHeight = heights[0]; return this.each(function(){ //Set each column to the max height $(this).css({'height': maxHeight}); }); }; jQuery(function($){ $('#leftcolumn,#rightcolumn,#contentwrapper').equalCols(); });