/*
Derived from a script by Alejandro Gervasio.
Modified to take class names by Andy Miller
*/
matchDivs=function(divclass){

    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'
      var reg = new RegExp("\\b" + divclass + "\\b");
          if(reg.test(divs[i].className)){
                d=divs[i];
                contDivs[contDivs.length]=d;
                // determine height for <div> element
                if(d.offsetHeight){
                    divHeight=d.offsetHeight;
                }
                else if(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";
    }
}

//non invasive way to add function to onload()
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(function(){
    if(document.getElementsByTagName){
        matchDivs("sameheight");
    }
});