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_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 switchLevel(id, state)
{
	MM_findObj('nav'+id).src=state ? "/~upload/nav_du_" + id + "on.gif" : "/~upload/nav_du_" + id + ".gif"
}

function switchLevel2(id, state)
{
	MM_findObj('nava'+id).src=state ? "img/subNavDot.gif" : "img/blank.gif"
}

function checkForm()
{
	//check ob Felder ausgef&uuml;llt sind	
	var check=1;

	obj=MM_findObj('editForm')
	for(i=0 ; i <= obj.length-1 ; i++)
	{
		x = obj.elements[i]

	    if((x.name == "title")||(x.name == "startDate"))
	    {
	    	if (x.value == "")
	        {
	        	check=0
				if(x.name == "title")
					alert("Bitte füllen Sie das Feld: 'Titel' aus");
				if(x.name == "startDate")
					alert("Bitte füllen Sie das Feld: 'Datum: Beginn' aus");
	            x.focus();
	            break;
	        }
	    }
	}
			
	//wenn das alles erf&uuml;llt ist und chkZ=1 ist, dann kann versendet werden.
	if(check==1)
	{
		obj.submit();
	}
}


function openWindow(dir, name, width, height, scroll, toolbar)
{
	dirName=dir
	param= "width="+width+",height="+height+",screenX=0,screenY=0, top=0, left=0, locationbar=no, menubar=no, resizeable=no, status=no";
	if(scroll)
		param+=",scrollbars=yes"
	if(toolbar)
		param+=",toolbar=yes"
	winName= name.replace(/ /,"_");
	window.open(dirName, winName, param);
}

function check_date(field){
var checkstr = "0123456789";
var DateField = field;
var Datevalue = "";
var DateTemp = "";
var seperator = ".";
var day;
var month;
var year;
var leap = 0;
var err = 0;
var i;
   err = 0;
   DateValue = DateField.value;
   /* Delete all chars except 0..9 */
   for (i = 0; i < DateValue.length; i++) {
	  if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) {
	     DateTemp = DateTemp + DateValue.substr(i,1);
	  }
   }
   DateValue = DateTemp;
   /* Always change date to 8 digits - string*/
   /* if year is entered as 2-digit / always assume 20xx */
   if (DateValue.length == 6) {
      DateValue = DateValue.substr(0,4) + '20' + DateValue.substr(4,2); }
   if (DateValue.length != 8) {
      err = 19;}
   /* year is wrong if year = 0000 */
   year = DateValue.substr(4,4);
   if (year == 0) {
      err = 20;
   }
   /* Validation of month*/
   month = DateValue.substr(2,2);
   if ((month < 1) || (month > 12)) {
      err = 21;
   }
   /* Validation of day*/
   day = DateValue.substr(0,2);
   if (day < 1) {
     err = 22;
   }
   /* Validation leap-year / february / day */
   if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) {
      leap = 1;
   }
   if ((month == 2) && (leap == 1) && (day > 29)) {
      err = 23;
   }
   if ((month == 2) && (leap != 1) && (day > 28)) {
      err = 24;
   }
   /* Validation of other months */
   if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) {
      err = 25;
   }
   if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) {
      err = 26;
   }
   /* if 00 ist entered, no error, deleting the entry */
   if ((day == 0) && (month == 0) && (year == 00)) {
      err = 0; day = ""; month = ""; year = ""; seperator = "";
   }
   /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */
   if (err == 0) {
      DateField.value = day + seperator + month + seperator + year;
   }
   /* Error-message if err != 0 */
   else {
      alert("Das Datum ist nicht korrekt!\nFormat: TT.MM.JJJJ (z.B. 12.03.2002)");
      DateField.select();
	  DateField.focus();
   }
}