function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

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 MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_MyPreloadImages () {
	MM_preloadImages('../img/nav/home00.gif','../img/nav/home01.gif','../img/nav/leistungen00.gif','../img/nav/leistungen01.gif','../img/nav/person00.gif','../img/nav/person01.gif','../img/nav/praxis00.gif','../img/nav/praxis01.gif','../img/nav/kontakt00.gif','../img/nav/kontakt01.gif');
}

function checkFields() {
	var errorArray = new Array();
	var target = document.Senden;
	if ( target.nachname.value == "" ) {
		errorArray[errorArray.length] = "Nachname";
	}
	if ( (target.email.value == "" || target.email.value.indexOf(".") < 0  || target.email.value.indexOf("@") < 0 ) && (target.telefon.value == "") ) {
		errorArray[errorArray.length] = "E-Mail Adresse und/oder Telefonnummer";
	}
	if ( target.nachricht.value == "" ) {
		errorArray[errorArray.length] = "Nachricht";
	}
	if (errorArray.length > 0 ) {
		var warnung  = "Sie haben nicht alle benötigten Daten angegeben.\n";
		    warnung += "Bitte vervollständigen Sie folgende Felder:\n";
		for ( i=0; i < errorArray.length; i++ ) {
			warnung += "    - " + errorArray[i] + "\n";
		}
		alert(warnung);
		return false;
	} else {
		return true;
	}
}