function displayNoneDiv(id){
		if(document.getElementById(id)){
			document.getElementById(id).style.display = 'none';
		}
}
function displayBlockDiv(id){
		if(document.getElementById(id)){
			document.getElementById(id).style.display = 'block';
		}
}
function setSubnaviPosiotion(id){
		if(document.getElementById(id))
		{
			//left position 202
			document.getElementById(id).style.left = Math.max(0, (document.body.clientWidth/2) - (990/2)) + 'px';
			document.getElementById(id).style.top = 1 + 233 + 23 + 'px'; //rahmen + header + navi
		}
}