var anz_bilder = 7;
    var aktnr = 0;

    function show_head_pic(nr)
    {
        bld = new Array();
        w = new Array();
        h = new Array();

        bld[1]  ="head_pic/pic01.gif";      w[1]  = 650;    h[1]  = 110;
        bld[2]  ="head_pic/pic02.gif";      w[2]  = 650;    h[2]  = 110;
        bld[3]  ="head_pic/pic03.gif";      w[3]  = 650;    h[3]  = 110;
        bld[4]  ="head_pic/pic04.gif";      w[4]  = 650;    h[4]  = 110;
        bld[5]  ="head_pic/pic05.gif";      w[5]  = 650;    h[5]  = 110;
        bld[6]  ="head_pic/pic06.gif";      w[6]  = 650;    h[6]  = 110;
        bld[7]  ="head_pic/pic07.gif";      w[7]  = 650;    h[7]  = 110;
        bld[8]  ="head_pic/pic08.gif";      w[8]  = 650;    h[8]  = 110;

        aktnr += nr;
        if (aktnr < 1)
            aktnr = anz_bilder;
        else {
            if (aktnr > anz_bilder)
                aktnr = 1;
        }

        document.head_pic.src = bld[aktnr];
        document.head_pic.width = w[aktnr];
        document.head_pic.height = h[aktnr];
    }

    function show()
    {   show_head_pic(1);
        setTimeout("show()",10000);
    }

    function UnCryptMailto(s, shift) {
    	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-(shift));
    	}
	    return r;
    }

    function linkTo_UnCryptMailto(s, shift) {
    	location.href=UnCryptMailto(s, shift);
    }