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_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function checkForm()
{
	var strMeldung;
	var myform = document.forms["formKontakt"];
    strMeldung="";
    strMeldung="Bitte füllen Sie mindestens folgende Felder aus:\n";
    if (cleanWhitespace(myform.Vorname)=="")
    	strMeldung+="\n Vorname";
    if (cleanWhitespace(myform.Name)=="")
    	strMeldung+="\n Name";
	//if (cleanWhitespace(myform.Firma)=="")
    //	strMeldung+="\n Firma";
    if (cleanWhitespace(myform.Email)=="")
    	strMeldung+="\n Email";
    else {	
    	if ((myform.Email.value.indexOf("@") == -1) || (myform.Email.value.lastIndexOf(".")<myform.Email.value.indexOf("@")))
    	strMeldung+="\n Email prüfen"; 
	}
    if (cleanWhitespace(myform.Nachricht)=="")
    	strMeldung+="\n Ihre Nachricht";

	if (strMeldung=="Bitte füllen Sie mindestens folgende Felder aus:\n")
    	document.forms["formKontakt"].submit();
    else
		alert(strMeldung);
}

function cleanWhitespace(elem)
{
  var strClean = "";
  if ( elem.value!="" )
  {
	  var intElemLength = elem.value.length;
	  var intElemLengthLast = elem.value.length - 1;
	  for (i = 0; i < intElemLength; i++)
	  {
		if (elem.value.charAt(i) != ' ')
	    { strClean += elem.value.charAt(i);}
	    else
	    {
	    	if (strClean.length > 0)
	        {
	        	if (elem.value.charAt(i+1) != ' ' && i != intElemLengthLast)
	          	{ strClean += elem.value.charAt(i);}
	        }
		}
	  }
  }		  
  return strClean;
}