C_heights = function() {
     var divs, contDivs, maxHeight, divHeight, d;

     // get all <div> elements in the document 
     divs = document.getElementsByTagName('div');
     contDivs = [];

     // initialize maximum height value 
     maxHeight = 0;

     // iterate over all <div> elements in the document 
     for(var i=0; i<divs.length; i++)
     { 
          // make collection with <div> elements with class attribute 'container' 
          if(/\bequalized\-height\b/.test(divs[i].className))
          { 
                d = divs[i];
                contDivs[contDivs.length] = d;

                divHeight = 0;
                // determine height for <div> element 
                if (d.offsetHeight && (!isNaN(d.offsetHeight)))
                { 
                     divHeight = d.offsetHeight;
                } 
                else if (d.style.pixelHeight && (!isNaN(d.style.pixelHeight)))
                { 
                     divHeight = d.style.pixelHeight;
                } 

                // calculate maximum height 
                maxHeight = Math.max(maxHeight, divHeight);
          } 
     } 

     // assign maximum height value to all of container <div> elements 
     for(var i=0; i<contDivs.length; i++)
     { 
          contDivs[i].style.height = maxHeight + "px";
     } 
}