function prld_img1() {
  if(document.images) {
    document.img_ov = new Array();
    var i; 
    for(i=0; i<8; i++) {
      document.img_ov[i]=new Image;
    }
    document.img_ov[0].src="images/fn/fn_fussball_h.jpg";
	document.img_ov[1].src="images/fn/fn_babette_h.jpg";
	document.img_ov[2].src="images/fn/fn_martha_h.jpg";
	document.img_ov[3].src="images/fn/fn_dinnershow_h.jpg";
	document.img_ov[4].src="images/fn/fn_kurse_h.jpg";
	document.img_ov[5].src="images/fn/fn_sonne_h.jpg";
	document.img_ov[6].src="images/fn/fn_clown_h.jpg";
	document.img_ov[7].src="images/fn/fn_spiele_h.jpg";
  }
}

function prld_img2() {
  if(document.images) {
    document.img_ov = new Array();
    var i; 
    for(i=0; i<4; i++) {
      document.img_ov[i]=new Image;
    }
    document.img_ov[0].src="images/kids/kp_tonne_h.jpg";
	  document.img_ov[1].src="images/kids/kp_sonne_h.jpg";
	  document.img_ov[2].src="images/kids/kp_clown_h.jpg";
	  document.img_ov[3].src="images/kids/kp_geburtstag_h.jpg";
  }
}

function prld_img3() {
  if(document.images) {
    document.img_ov = new Array();
    var i; 
    for(i=0; i<14; i++) {
      document.img_ov[i]=new Image;
    }
    document.img_ov[0].src="images/download/fl_fussball_h.jpg";
	document.img_ov[1].src="images/download/fl_martha_h.jpg";
	document.img_ov[2].src="images/download/fl_clown_h.jpg";
	document.img_ov[3].src="images/download/fl_spiele_h.jpg";
	document.img_ov[4].src="images/download/martha_1ph.jpg";
	document.img_ov[5].src="images/download/martha_2ph.jpg";
	document.img_ov[6].src="images/download/fussball_1ph.jpg";
	document.img_ov[7].src="images/download/fussball_2ph.jpg";
	document.img_ov[8].src="images/download/babette_1ph.jpg";
	document.img_ov[9].src="images/download/babette_2ph.jpg";
	document.img_ov[10].src="images/download/sonne_1ph.jpg";
	document.img_ov[11].src="images/download/sonne_2ph.jpg";
	document.img_ov[12].src="images/download/tonne_1ph.jpg";
	document.img_ov[13].src="images/download/clown_1ph.jpg";
	}
}

function swp_img(v1, v2) {
  var hlp;  
  hlp = eval("document."+v1);
  hlp.src = document.img_ov[v2].src;
}

function rst_img(v1, v2) {
  var hlp;  
  hlp = eval("document."+v1);
  hlp.src = v2;
}

// decrypt helper function
function decryptCharcode(n,start,end,offset)
{
	n = n + offset;
	if (offset > 0 && n > end)	{
		n = start + (n - end - 1);
	} else if (offset < 0 && n < start)	{
		n = end - (start - n - 1);
	}
	return String.fromCharCode(n);
}

// decrypt string
function decryptString(enc,offset) 
{
	var dec = "";
	var len = enc.length;
	for(var i=0; i < len; i++)	{
		var n = enc.charCodeAt(i);
		if (n >= 0x2B && n <= 0x3A)	{
			dec += decryptCharcode(n,0x2B,0x3A,offset);	// 0-9 . , - + / :
		} else if (n >= 0x40 && n <= 0x5A)	{
			dec += decryptCharcode(n,0x40,0x5A,offset);	// A-Z @
		} else if (n >= 0x61 && n <= 0x7A)	{
			dec += decryptCharcode(n,0x61,0x7A,offset);	// a-z
		} else {
			dec += enc.charAt(i);
		}
	}
	return dec;
}

// click and show decrypting email
function UnCryptMail(m,k)
{
 k = -k
 location.href = decryptString(m,k);
}