function acrobat_hover(img_name)
{document.getElementById(img_name).style.backgroundImage = 'url(bilder/navi/navi_download_acrobat_leer.png)';}
function acrobat_out(img_name)
{document.getElementById(img_name).style.backgroundImage = 'url(bilder/navi/navi_download_acrobat_50trans.png)';}

function html_click(img_name)
{document.getElementById(img_name).style.backgroundImage = 'url(bilder/html-folgt.png)';}
function html_out(img_name)
{document.getElementById(img_name).style.backgroundImage = 'url(bilder/platz.png)';}


function pssst( s )
	{var n = 0;
		var r = "";
		for( var i = 0; i < s.length; i++)
		{n = s.charCodeAt( i );
			if( n >= 8364 )
			{n = 128;}
			r += String.fromCharCode( n - 1 );
		}
		return r;
	}

	function mail( s )
	{location.href=pssst( s );}