var win=0;
function move_navi_bar()
{
	var topspace=130;//     vgl. index.php header height
	var offset;
	var minsize=500;
	
		minsize += 70;
	
	offset=parseInt(window.pageYOffset);
	if(window.pageYOffset=="undefined" || window.pageYOffset==undefined)
	{
		// => warscheinlich Internet Explorer
		offset=parseInt(document.body.scrollTop);
	}
	
	if (offset > 130)
		minsize -= 130;
	
	nbar=document.getElementById('navibar');
	
	// falls Fenster zu klein ist, "laeuft das Menue immer weg"
	// (Mozilla, Opera, ...   || Internet explorer)
	if(window.innerHeight < minsize || 
	   document.body.offsetHeight <minsize)
	{
		nbar.style.top='130px';
		return;
	}
	
	if (offset>topspace-25)
		nbar.style.top = (offset+25)+'px';
	else
		nbar.style.top = topspace+'px';
}