function fillthescreen(){
	adjH = 0; // header height & some for footer
	winH = windowHeight(); //This returns the screen heigth
	heightNeeded= document.getElementById("container").offsetHeight - adjH;

//	alert ('winH= ' + winH + '\nneeded= ' + heightNeeded);
	if (winH > heightNeeded) { // viewport is longer than content
		document.getElementById('container').style.height=(winH - adjH)+'px'; // stretch content to viewport height
	}
}

function windowHeight(){
	var alto= 0;
	if( typeof( window.innerWidth ) == 'number' ) {
		alto= window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		alto= document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		alto= document.body.clientHeight;
	}
	return alto;
}