function layout_img_toggle(element) {
	/* Konvention für Dateiname : image.gif -> over_image.gif */
	var image = element.src;
	var path = image.substr(0,image.lastIndexOf("/")+1);
	
	if (image.substr(image.lastIndexOf("/")+1,4) == "over") {
		element.src = path + image.substr(image.lastIndexOf("/")+6,image.length);
	} else {
		element.src = path + "over_" + (image.substr(image.lastIndexOf("/")+1,image.length));
	}
}

function layout_div_toggle(element) {
	if (element.className.slice(0,5) == "over_") {
		element.className = element.className.substring(5, element.className.length);
	} else {
		element.className = "over_" + element.className;
	}
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function showPopup(url) {
	
	
    winWidth=800;
    winHeight=410;
	
    breite = screen.width - 0;
    hoehe = screen.height - 0;
    
    px = breite/2-(winWidth/2)-5;
    py = hoehe/2-(winHeight/2)-5;
  
    wndProps = "top="+py+",left="+px+",width="+winWidth+",height="+winHeight+",dependant=yes,scrollbars=no,resizable=no";
    
    myWnd = window.open(url,"Popup",wndProps);
	
}


function checkRegisterForm() {
	if (!document.registerForm.elements["f_RegisterEmail"].value) {
		alert("Bitte geben sie ihre Email ein!");
		document.registerForm.elements["f_RegisterEmail"].style.backgroundColor = "#ffdddd";
		document.registerForm.elements["f_RegisterEmail"].focus();
		return false;
	}

	if (!document.registerForm.elements["f_RegisterPassword"].value) {
		alert("Bitte geben sie ihre Passwort ein!");
		document.registerForm.elements["f_RegisterPassword"].style.backgroundColor = "#ffdddd";
		document.registerForm.elements["f_RegisterPassword"].focus();
		return false;
	}
	
	if (!document.registerForm.elements["f_RegisterName"].value) {
		alert("Bitte geben sie ihren Namen ein!");
		document.registerForm.elements["f_RegisterName"].style.backgroundColor = "#ffdddd";
		document.registerForm.elements["f_RegisterName"].focus();
		return false;
	}
	
	if (!document.registerForm.elements["f_RegisterVorname"].value) {
		alert("Bitte geben sie ihren Vornamen ein!");
		document.registerForm.elements["f_RegisterVorname"].style.backgroundColor = "#ffdddd";
		document.registerForm.elements["f_RegisterVorname"].focus();
		return false;
	}
	
	if (!document.registerForm.elements["f_RegisterStrasse"].value) {
		alert("Bitte geben sie ihre Strasse ein!");
		document.registerForm.elements["f_RegisterStrasse"].style.backgroundColor = "#ffdddd";
		document.registerForm.elements["f_RegisterStrasse"].focus();
		return false;
	}
	
	if (!document.registerForm.elements["f_RegisterOrt"].value) {
		alert("Bitte geben sie ihre Email ein!");
		document.registerForm.elements["f_RegisterOrt"].style.backgroundColor = "#ffdddd";
		document.registerForm.elements["f_RegisterOrt"].focus();
		return false;
	}
	
	if (!document.registerForm.elements["f_RegisterPLZ"].value) {
		alert("Bitte geben sie ihre Email ein!");
		document.registerForm.elements["f_RegisterPLZ"].style.backgroundColor = "#ffdddd";
		document.registerForm.elements["f_RegisterPLZ"].focus();
		return false;
	}
}