### Beispiel - Datei dhtml.js:

    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;
    }

    function getElement (Mode, Identifier, ElementNumber) {
      var Element;
      if (DOM) {
        if (Mode.toLowerCase() == "id") {
          if (typeof document.getElementById(Identifier) == "object") {
            Element = document.getElementById(Identifier);
          } else {
            Element = false;
          }
          return Element;
        }
        if (Mode.toLowerCase() == "name") {
          var ElementList = document.getElementsByName(Identifier);
          if (typeof ElementList == "object" || (OP && typeof ElementList == "function")) {
            Element = ElementList[ElementNumber];
          } else {
            Element = false;
          }
          return Element;
        }
        if (Mode.toLowerCase() == "tagname") {
          var ElementList = document.getElementsByTagName(Identifier);
          if (typeof ElementList == "object" || (OP && typeof ElementList == "function")) {
            Element = ElementList[ElementNumber];
          } else {
            Element = false;
          }
          return Element;
        }
        return null;
      }
      if (MSIE4) {
        if (Mode.toLowerCase() == "id") {
          if (typeof document.all[Identifier] == "object") {
            Element = document.all[Identifier];
          } else {
            Element = false;
          }
          return Element;
        }
        if (Mode.toLowerCase() == "tagname") {
          if (typeof document.all.tags(Identifier) == "object") {
            Element = document.all.tags(Identifier)[ElementNumber];
          } else {
            Element = false;
          }
          return Element;
        }
        if (Mode.toLowerCase() == "name") {
          if (typeof document[Identifier] == "object") {
            Element = document[Identifier];
          } else {
            Element = false;
          }
          return Element;
        }
        return false;
      }
      if (NS4) {
        if (Mode.toLowerCase() == "id" || Mode.toLowerCase() == "name") {
          if (typeof document[Identifier] == "object") {
            Element = document[Identifier];
          } else {
            Element = false;
          }
          return Element;
        }
        if (Mode.toLowerCase() == "index") {
          if (typeof document.layers[Identifier] == "object") {
            Element = document.layers[Identifier];
          } else {
            Element = false;
          }
          return Element;
        }
        return false;
      }
      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 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) {
        if (typeof Element[ElementNumber] == "object") {
          Attribute = Element[ElementNumber][AttributeName];
        } else {
          Attribute = Element[AttributeName]
        }
        return Attribute;
      }
      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;
      }
    }

zurück zur Beschreibung der Bibliothek