function stoperror(){
	return true;
	Window.onerror=stoperror;
}
function errorcode(Nachricht,Datei,Zeile){
	Fehlermeldung="Fehlmeldung:\n" + Nachricht + "\n" + Datei + "\n" + Zeile;
	alert (Fehlermeldung);
}

function openScript(url, width, height) {
	var Win = window.open(url,"openScript",'width=' + width + ',height=' + height + ',resizable=1,scrollbars=yes,menubar=yes,status=yes' );
}
function reloadPage(init) {  //reloads the window if Nav4 resized
	if (init==true) with (navigator) {
		if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
        		document.pgW=innerWidth;
        		document.pgH=innerHeight;
        		onresize=reloadPage;
        	}
        }
        else if (innerWidth!=document.pgW || innerHeight!=document.pgH) location.reload();
        reloadPage(true);
}

function unixcode(pruefcode){
	if (pruefcode.search(/\W/) !=-1){
		return false;
	}else{
		return true;
	}
}

function machklein(ausdruck) {
	var neu = ausdruck.toLowerCase();
 	return neu
}
function zaehl(ausdruck,suchbegriff){
	var suche = eval("/"+suchbegriff+"/gi");
	var ergebnis="";
	var ergebnis = ausdruck.match(suche);
	if (ergebnis){
		return ergebnis.length
	}else{
		return "-1"
	}
}
function qcount(ausdruck,suchbegriff){
	var ergebnis="";
	var ergebnis = ausdruck.match(suchbegriff);
	if (ergebnis){
		return ergebnis.length
	}else{
		return "-1"
	}
}

function validate(form,art)
{
}

function doHighlight(bodyText, searchTerm, highlightStartTag, highlightEndTag)
{
  // the highlightStartTag and highlightEndTag parameters are optional
  if ((!highlightStartTag) || (!highlightEndTag)) {
    highlightStartTag = "<font style='color:blue; background-color:yellow;'>";
    highlightEndTag = "</font>";
  }

  // find all occurences of the search term in the given text,
  // and add some "highlight" tags to them (we're not using a
  // regular expression search, because we want to filter out
  // matches that occur within HTML tags and script blocks, so
  // we have to do a little extra validation)
  var newText = "";
  var i = -1;
  var lcSearchTerm = searchTerm.toLowerCase();
  var lcBodyText = bodyText.toLowerCase();

  while (bodyText.length > 0) {
    i = lcBodyText.indexOf(lcSearchTerm, i+1);
    if (i < 0) {
      newText += bodyText;
      bodyText = "";
    } else {
      // skip anything inside an HTML tag
      if (bodyText.lastIndexOf(">", i) >= bodyText.lastIndexOf("<", i)) {
        // skip anything inside a <script> block
        if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) {
          newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
          bodyText = bodyText.substr(i + searchTerm.length);
          lcBodyText = bodyText.toLowerCase();
          i = -1;
        }
      }
    }
  }

  return newText;
}


/*
 * This is sort of a wrapper function to the doHighlight function.
 * It takes the searchText that you pass, optionally splits it into
 * separate words, and transforms the text on the current web page.
 * Only the "searchText" parameter is required; all other parameters
 * are optional and can be omitted.
 */
function highlightSearchTerms(searchText, treatAsPhrase, warnOnFailure, highlightStartTag, highlightEndTag)
{
	if (searchText != "") {

	  // if the treatAsPhrase parameter is true, then we should search for
	  // the entire phrase that was entered; otherwise, we will split the
	  // search string so that each word is searched for and highlighted
	  // individually
	  if (treatAsPhrase) {
	    searchArray = [searchText];
	  } else {
	    searchArray = searchText.split(" ");
	  }

	  if (!document.body || typeof(document.body.innerHTML) == "undefined") {
	    if (warnOnFailure) {
	      alert("Sorry, for some reason the text of this page is unavailable. Searching will not work.");
	    }
	    return false;
	  }

	  var bodyText = document.body.innerHTML;
	  for (var i = 0; i < searchArray.length; i++) {
	    bodyText = doHighlight(bodyText, searchArray[i], highlightStartTag, highlightEndTag);
	  }

	  document.body.innerHTML = bodyText;
	  return true;
	}
}


/*
 * This displays a dialog box that allows a user to enter their own
 * search terms to highlight on the page, and then passes the search
 * text or phrase to the highlightSearchTerms function. All parameters
 * are optional.
 */
function searchPrompt(defaultText, treatAsPhrase, textColor, bgColor)
{
  // This function prompts the user for any words that should
  // be highlighted on this web page
  if (!defaultText) {
    defaultText = "";
  }

  // we can optionally use our own highlight tag values
  if ((!textColor) || (!bgColor)) {
    highlightStartTag = "";
    highlightEndTag = "";
  } else {
    highlightStartTag = "<font style='color:" + textColor + "; background-color:" + bgColor + ";'>";
    highlightEndTag = "</font>";
  }

  if (treatAsPhrase) {
    promptText = "Please enter the phrase you'd like to search for:";
  } else {
    promptText = "Please enter the words you'd like to search for, separated by spaces:";
  }

  searchText = prompt(promptText, defaultText);

  if (!searchText)  {
    alert("No search terms were entered. Exiting function.");
    return false;
  }

  return highlightSearchTerms(searchText, treatAsPhrase, true, highlightStartTag, highlightEndTag);
}


/*
 * This function takes a referer/referrer string and parses it
 * to determine if it contains any search terms. If it does, the
 * search terms are passed to the highlightSearchTerms function
 * so they can be highlighted on the current page.
 */
function highlightGoogleSearchTerms(referrer)
{
  // This function has only been very lightly tested against
  // typical Google search URLs. If you wanted the Google search
  // terms to be automatically highlighted on a page, you could
  // call the function in the onload event of your <body> tag,
  // like this:
  //   <body onload='highlightGoogleSearchTerms(document.referrer);'>

  //var referrer = document.referrer;
  if (!referrer) {
    return false;
  }

  var queryPrefix = "q=";
  var startPos = referrer.toLowerCase().indexOf(queryPrefix);
  if ((startPos < 0) || (startPos + queryPrefix.length == referrer.length)) {
    return false;
  }

  var endPos = referrer.indexOf("&", startPos);
  if (endPos < 0) {
    endPos = referrer.length;
  }

  var queryString = referrer.substring(startPos + queryPrefix.length, endPos);
  // fix the space characters
  queryString = queryString.replace(/%20/gi, " ");
  queryString = queryString.replace(/\+/gi, " ");
  // remove the quotes (if you're really creative, you could search for the
  // terms within the quotes as phrases, and everything else as single terms)
  queryString = queryString.replace(/%22/gi, "");
  queryString = queryString.replace(/\"/gi, "");

  return highlightSearchTerms(queryString, false);
}


/*
 * This function is just an easy way to test the highlightGoogleSearchTerms
 * function.
 */
function testHighlightGoogleSearchTerms()
{
  var referrerString = "http://www.google.com/search?q=javascript%20highlight&start=0";
  referrerString = prompt("Test the following referrer string:", referrerString);
  return highlightGoogleSearchTerms(referrerString);
}

function clear_field(field) {
    	if (field.value=="Suchbegriff")
        	{
		field.value="";
	}
    	if (field.value=="Benutzername")
        	{
		field.value="";
	}
}
function paste_field(field)  {
	if (field.name=="searchstring" && field.value=="") {
		field.value="Suchbegriff";
     	}
	if (field.name=="searchuser" && field.value=="") {
		field.value="Benutzername";
     	}
}