window.onload = resizeContent;
window.onresize = resizeContent;

function resizeContent(){
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  var elHeader = document.getElementById("header").offsetHeight;
  var elNav = document.getElementById("nav").offsetHeight;
  var elFooter = document.getElementById("footer").offsetHeight;
  var elContent = document.getElementById("content");
  var elInnerContent = document.getElementById("inner");
  var newHeight = myHeight - elHeader - elNav - elFooter - 44;
  if (elContent.offsetHeight < newHeight){
    elContent.style.height = newHeight +"px";   
  } 
    elInnerContent.style.height = elContent.offsetHeight - 60  +"px";
  
}