// JavaScript Document

 function sizeContent(){

  var q = parseInt(document.body.offsetHeight) - (parseInt(document.getElementById("siteTop").offsetHeight) + parseInt(document.getElementById("siteBottom").offsetHeight));

  document.getElementById("TalleContent").style.height = q+"px";

 }

 window.onresize = function(){ try{ sizeContent(); }catch(e){}; };