function fixH(one,two) {
if (document.getElementById(one)) {
var lh=document.getElementById(one).offsetHeight;
var rh=document.getElementById(two).offsetHeight;
var nh = Math.max(lh, rh); 
document.getElementById(one).style.height=nh+"px";
document.getElementById(two).style.height=nh+"px";
}
}

//this does it for three
function sortNum(a,b) { return b-a} 
function fixH2(one,two,three) {
if (document.getElementById(one)) {
var obj=new Array(3);
var option=[one,two,three];
for(var i=0; i<option.length; i++) {
document.getElementById(option[i]).style.height="auto";
obj[i]=document.getElementById(option[i]).offsetHeight;
nh=obj.sort(sortNum);
} 
nh1=nh.splice(1,2);
for(var i=0; i<option.length; i++) {
document.getElementById(option[i]).style.height=nh+"px";
}
}
}
//


window.onload=function(){
fixH('nav','content'); 
fixH2('nav','content','right');
}