function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("wz_layout");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("wz_layout", title, 365);
}

var cookie = readCookie("wz_layout");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);

		function resizeImage(id, amount) {
			//image = document[id];
			image = document.images[id];
			form_width = eval('document.forms[\'cartform\'].width_'+id);
			form_height = eval('document.forms[\'cartform\'].height_'+id);
			image.width = amount;
			form_width.value = image.width;
			form_height.value = image.height;
		}

function checkme()
{
        if(document.forms['cartform'].cart_myname.value <= 3){
                alert ("Bitte geben Sie Ihren Namen an!");
                document.forms['cartform'].cart_myname.focus();
        return false;
        }
        if(document.forms['cartform'].cart_mymail.value ==""){
                alert ("Bitte geben Sie Ihre e-Mail Adresse an!");
                document.forms['cartform'].cart_mymail.focus();
        	return false;
        } else {
			if(teste_mail(document.forms['cartform'].cart_mymail.value)==false) {
				alert("Ihre e-Mail Adresse ist nicht richtig formatiert (korrektes Format: name@domain.ext) !");
				document.forms['cartform'].cart_mymail.value="";
				document.forms['cartform'].cart_mymail.focus();
				return false;
			}
        }
        if(document.forms['cartform'].cart_destname.value <= 3){
                alert ("Bitte geben Sie den Namen des Empfängers an!");
                document.forms['cartform'].cart_destname.focus();
        return false;
        }
        if(document.forms['cartform'].cart_destmail.value ==""){
                alert ("Bitte geben Sie die e-Mail Adresse des Empfängers an!");
                document.forms['cartform'].cart_destmail.focus();
        return false;
        } else {
			if(teste_mail(document.forms['cartform'].cart_destmail.value)==false) {
				alert("Die e-Mail Adresse des Empfängers ist nicht richtig formatiert (korrektes Format: name@domain.ext) !");
				document.forms['cartform'].cart_destmail.value="";
				document.forms['cartform'].cart_destmail.focus();
				return false;
			}
        }
        
        return true;
}

function teste_mail(adress_string)
{
	var affe="@",punkt=".",eingabe,laenge,i,buchstabe,check_affe=0,check_punkt=0;
	eingabe=adress_string;
	laenge=eingabe.length;
	for(i=0;i<laenge;i++)
	{
		buchstabe=eingabe.charAt(i);
		if(affe.indexOf(buchstabe)==0)
			{check_affe=1;}
		if(punkt.indexOf(buchstabe)==0)
			{check_punkt=1;}
	}
	if(eingabe!="")
	{
		if(check_affe==0 || check_punkt==0)
		{
			return false;
		}
	}
	return true;
}