/* DHTML-Bibliothek
Basiert auf dhtml.js von selfhtml
http://de.selfhtml.org/dhtml/beispiele/dhtml_bibliothek.htm
*/

/*
Einfache Browsererkennung
*/
var browserAgent   =  navigator.userAgent.toLowerCase();
var is_nn = (browserAgent.indexOf("netscape") != -1);
var is_ff = (browserAgent.indexOf("firefox") != -1);
var is_ie = (browserAgent.indexOf("msie") != -1);
var is_op = (browserAgent.indexOf("opera") != -1);

var DHTML = false, DOM =false, MSIE4 = false, NS4 = false, OP = false;

if (document.getElementById) {
  DHTML = true;
  DOM = true;
} else {
  if (document.all) {
    DHTML = true;
    MSIE4 = true;
  } else {
    if (document.layers) {
      DHTML = true;
      NS4 = true;
    }
  }
}
if (window.opera) {
  OP = true;
}

/* Hander zur Ermittlung der Mauszeigerposition */
var mouseX, mouseY;

if (document.addEventListener)
{
    document.addEventListener("mousemove", handleMouseMove, true);
} else {
    document.body.onmousemove = handleMouseMove;
}

function handleMouseMove (ev)
{
  if (!ev) ev = window.event;
  mouseX = ev.pageX ? ev.pageX : ev.clientX;
  mouseY = ev.pageY ? ev.pageY : ev.clientY;
  if(is_ie)
  {
    mouseY = mouseY - 70;
    mouseX = mouseX - 140;
  } else if(is_ff) {
    mouseY = mouseY - 70;
    mouseX = mouseX - 150;
  }
}


/*****************************
* Dhtml Funktionen
******************************/

var scrollXOffset = 0;
var scrollYOffset = 0;

function getScrollOffset()
{
  // all except Explorer
  if (self.pageYOffset)
  {
	scrollXOffset = self.pageXOffset;
	scrollYOffset = self.pageYOffset;
  } // Explorer 6 Strict
  else if (document.documentElement && document.documentElement.scrollTop)
  {
	scrollXOffset = document.documentElement.scrollLeft;
	scrollYOffset = document.documentElement.scrollTop;
  } // all other Explorers
   else if (document.body)
  {
	scrollXOffset = document.body.scrollLeft;
	scrollYOffset = document.body.scrollTop;
  }
}

function getElement (Mode, Identifier, ElementNumber) {
  var Element, ElementList;
  if (DOM) {
    if (Mode.toLowerCase() == "id") {
      Element = document.getElementById(Identifier);
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "name") {
      ElementList = document.getElementsByName(Identifier);
      Element = ElementList[ElementNumber];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "tagname") {
      ElementList = document.getElementsByTagName(Identifier);
      Element = ElementList[ElementNumber];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    return false;
  }
  if (MSIE4) {
    if (Mode.toLowerCase() == "id" || Mode.toLowerCase() == "name") {
      Element = document.all(Identifier);
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "tagname") {
      ElementList = document.all.tags(Identifier);
      Element = ElementList[ElementNumber];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    return false;
  }
  if (NS4) {
    if (Mode.toLowerCase() == "id" || Mode.toLowerCase() == "name") {
      Element = document[Identifier];
      if (!Element) {
        Element = document.anchors[Identifier];
      }
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "layerindex") {
      Element = document.layers[Identifier];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    return false;
  }
  return false;
}

function getAttribute (Mode, Identifier, ElementNumber, AttributeName) {
  var Attribute;
  var Element = getElement(Mode, Identifier, ElementNumber);
  if (!Element) {
    return false;
  }
  if (DOM || MSIE4) {
    Attribute = Element.getAttribute(AttributeName);
    return Attribute;
  }
  if (NS4) {
    Attribute = Element[AttributeName]
    if (!Attribute) {
       Attribute = false;
    }
    return Attribute;
  }
  return false;
}

function getContent (Mode, Identifier, ElementNumber) {
  var Content;
  var Element = getElement(Mode, Identifier, ElementNumber);
  if (!Element) {
    return false;
  }
  if (DOM && Element.firstChild) {
    if (Element.firstChild.nodeType == 3) {
      Content = Element.firstChild.nodeValue;
    } else {
      Content = "";
    }
    return Content;
  }
  if (MSIE4) {
    Content = Element.innerText;
    return Content;
  }
  return false;
}

function setContent (Mode, Identifier, ElementNumber, Text) {
  var Element = getElement(Mode, Identifier, ElementNumber);
  if (!Element) {
    return false;
  }
  if (DOM && Element.firstChild) {
    Element.firstChild.nodeValue = Text;
    return true;
  }
  if (MSIE4) {
    Element.innerText = Text;
    return true;
  }
  if (NS4) {
    Element.document.open();
    Element.document.write(Text);
    Element.document.close();
    return true;
  }
}