// JavaScript Document

function getScreenHeight() {
	return self.innerHeight || (document.documentElement.clientHeight || document.body.clientHeight);
}

function setIframeHeight() {
	
	var id = document.getElementById('header');
	
	var titleHeight = (id.offsetHeight > 0) ? id.offsetHeight : id.clientHeight;
	
	titleHeight = titleHeight + 50;
	
	var frameHeight = getScreenHeight() - titleHeight;
	
	if(frameHeight < 500) { frameHeight = 500; }
	
	document.getElementById('framepje').style.height = frameHeight + "px";
}

if (window.addEventListener){
	window.addEventListener('resize', setIframeHeight, false); 
} else if (window.attachEvent){
	window.attachEvent('resize', setIframeHeight);
}

setIframeHeight();