var myWidth = 0, myHeight = 0;	

function calcHeight() {
	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;
	
	}
}

function setzeScrollHoehe() {
	calcHeight();
	obenAbstand=80;
	untenAbstand=95;
	neueHoehe = myHeight - obenAbstand - untenAbstand;
	scrollerObjekt = document.getElementById('Inhalt');
	scrollerObjekt.style.height = neueHoehe+'px';
	}