function getWindowSize () {
	if (window.innerHeight) {
		return window.innerHeight;
	} else if (document.body && document.body.offsetHeight) {
		return document.body.offsetHeight;
	} else {
		return 0;
  }
}

function applyRelativeDivSize (){
	var contentHeight = getWindowSize()-136;
	if (contentHeight >= 470) {
		document.getElementById("content").style.height = contentHeight+"px";
	}
}