Netscape Navigator 4.x Subclass Object Listing

<!--
function docjslibNS4SubClass() {
  this.inheritFrom = docjslibSuperClass;
  this.inheritFrom();
  
  this.getSrc = getSrcMethod;
  this.setSrc = setSrcMethod;
  this.setPosFromLeft = setPosFromLeftMethod;
  this.setPosFromTop = setPosFromTopMethod;
  this.setZposition = setZpositionMethod;
  this.setVisibility = setVisibilityMethod;
  this.doThisCommandEveryIntervalMS = doThisCommandEveryIntervalMSMethod;
  this.getWindowWidth = getWindowWidthMethod;
  this.getWindowHeight = getWindowHeightMethod;
  this.getPageScrollLeft = getPageScrollLeftMethod;
  this.getPageScrollTop = getPageScrollTopMethod;
  this.findHighestZ = findHighestZMethod;
  
  function getSrcMethod(id) {
    return eval("document." + id + ".document." + id + ".src");
  }
  
  function setSrcMethod(id, url) {
    eval("document." + id + ".document." + id).src = url;
  }
  
  function setPosFromLeftMethod(id, xCoord) {
    eval("document." + id).left = xCoord;
  }
  
  function setPosFromTopMethod(id, yCoord) {
    eval("document." + id).top = yCoord;
  }

  function setZpositionMethod(id, z) {
    eval("document." + id).zIndex = z;
  }

  function setVisibilityMethod(id, flag) {
    var str = (flag) ? 'show' : 'hide';
    eval("document." + id).visibility = str;
  }
  
  function doThisCommandEveryIntervalMSMethod(command, interval) {
  setInterval(eval('"' + command + '"'), interval);
  }

  function getWindowWidthMethod() {
    return window.innerWidth;
  }

  function getWindowHeightMethod() {
    return window.innerHeight;
  }

  function getPageScrollLeftMethod() {
    return window.pageXOffset;
  }

  function getPageScrollTopMethod() {
    return window.pageYOffset;
  }
  
  function findHighestZMethod() {
    var documentDivs = new Array();
    documentDivs = document.layers;
    var highestZ = 0;
    for (var i = 0; i < documentDivs.length; i++) {
      var zIndex = documentDivs[i].zIndex;
      highestZ = (zIndex > highestZ) ? zIndex : highestZ;
    }
    return highestZ;
  }
}
// -->

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