var mainLeft = document.getElementById("mainLeft").scrollHeight; 
var mainRight = document.getElementById("mainRight").scrollHeight; 
var mainContent = document.getElementById("mainContent").scrollHeight; 
var left = document.getElementById("left").scrollHeight; 
var right = document.getElementById("right").scrollHeight; 
var mainLine = document.getElementById("mainLine").scrollHeight; 
var layoutHeight1 = Math.max(mainLeft,mainRight,mainContent,left,right,mainLine); 
document.getElementById("mainLeft").style.height = layoutHeight1+"px"; 
document.getElementById("mainRight").style.height = layoutHeight1+"px"; 
document.getElementById("mainContent").style.height = layoutHeight1+"px"; 
document.getElementById("left").style.height = layoutHeight1+"px"; 
document.getElementById("right").style.height = layoutHeight1+"px"; 
document.getElementById("mainLine").style.height = layoutHeight1+"px"; 

var footerLeft = document.getElementById("footerLeft").scrollHeight; 
var footerRight = document.getElementById("footerRight").scrollHeight; 
var footerContent = document.getElementById("footerContent").scrollHeight; 
var layoutHeight = Math.max(footerLeft,footerRight,footerContent); 
document.getElementById("footerLeft").style.height = layoutHeight+"px"; 
document.getElementById("footerRight").style.height = layoutHeight+"px"; 
document.getElementById("footerContent").style.height = layoutHeight+"px";