// JavaScript Document

//addEvent - attach a function to an event
function addEvent(obj, evType, fn){
 if (obj.addEventListener){
 obj.addEventListener(evType, fn, false);
 return true;
 } else if (obj.attachEvent){
 var r = obj.attachEvent("on"+evType, fn);
 return r;
 } else {
 return false;
 }
}

function equalHeight (){
 var obj1 = document.getElementById ('left_div');
 var obj2 = document.getElementById ('body_big');
 var obj3 = document.getElementById ('body_small');
 var obj4 = document.getElementById ('right_div');
 
 var maxh = 0;
 if (obj1) maxh = obj1.offsetHeight;
 if (obj2 && obj2.offsetHeight > maxh) maxh = obj2.offsetHeight;
 if (obj3 && obj3.offsetHeight > maxh) maxh = obj3.offsetHeight;
 if (obj4 && obj4.offsetHeight > maxh) maxh = obj4.offsetHeight;
 if (obj1) obj1.style.height = maxh + "px";
 if (obj2) obj2.style.height = maxh + "px";
 if (obj3) obj3.style.height = maxh + "px";
 if (obj4) obj4.style.height = maxh + "px";
 }

addEvent (window, 'load', equalHeight);