Detecting Navigator and Internet Explorer : Layer « HTML « JavaScript DHTML





Detecting Navigator and Internet Explorer


/*
JavaScript Unleashed, Third Edition
by Richard Wagner and R. Allen Wyke 

ISBN: 067231763X
Publisher Sams CopyRight 2000

*/
<html>
<body>
   
<script language="JavaScript">
<!--
   
//Create a layer tag if netscape
if(navigator.appName.indexOf("Netscape") != -1)
  document.write('<layer id="redBox" ');
   
//Create a div tag if Microsoft

if(navigator.appName.indexOf("Microsoft") != -1)
  document.write("<div id='redBox' ");
   
//Set the style used for the red box
document.write('style="position:absolute; ');
document.write('left:150px; ');
document.write('top:150px; ');
document.write('background-color:red;">');
   
//-->
</script>
   
   
This is a block of moving buttons
<form>
<input type="button"
       value="UP"
       onClick="moveUp()">
<input type="button"
       value="DOWN"
       onCLick="moveDown()">
<input type="button"
       value="LEFT"
       onClick="moveLeft()">
<input type="button"
       value="RIGHT"
       onClick="moveRight()"><BR>
<input type="button"
       value="SHOW/HIDE Text Box"
       onClick="showHide()">
</form>
   
<script language="JavaScript">
<!--
//If Netscape close the layer tag
if(navigator.appName.indexOf("Netscape") != -1)
  document.write("</layer>");
   
//If Microsoft close div tag
if(navigator.appName.indexOf("Microsoft") != -1)
  document.write("</div>");
//-->

</script>
   
<script language="JavaScript">
<!--
//If Netscape create a text layer using layer tag
if(navigator.appName.indexOf("Netscape") != -1)
{
  document.write('<layer id="textBox" >');
  document.write("Here is some text defined as a block");
  document.write("</layer>");
}
   
//If Microsoft create a text block using div tag
if(navigator.appName.indexOf("Microsoft") != -1)
{
  document.write("</div>");
  document.write("<div id='textBox'>");
  document.write("Here is some text defined as a block");
  document.write("</div>");
}
//-->
</script>
   
   
<script language="JavaScript">
<!--
   
var isNetscape = 0;
var isMicrosoft = 0;
   
//Determine if this is a Netscape or Microsoft browser
if(navigator.appName.indexOf("Netscape") != -1)
  isNetscape = 1;
if(navigator.appName.indexOf("Microsoft") != -1)
  isMicrosoft = 1;
   
//Move the red box up 20 pixels
function moveUp()
{
  if(isNetscape)
    document.layers.redBox.pageY+=(-20);
  if(isMicrosoft)

    document.all.redBox.style.pixelTop+=(-20);
}
   
//Move the red box down 20 pixels
function moveDown()
{
  if(isNetscape)
    document.layers.redBox.pageY+=20;
  if(isMicrosoft)
    document.all.redBox.style.pixelTop+=20;
}
   
//Move the red box to the left 20 pixels
function moveLeft()
{
  if(isNetscape)
    document.layers.redBox.pageX+=(-20);
  if(isMicrosoft)
    document.all.redBox.style.pixelLeft+=(-20);
}
   
//Move the red box to the right 20 pixels.
function moveRight()
{
  if(isNetscape)
    document.layers.redBox.pageX+=20;
  if(isMicrosoft)
    document.all.redBox.style.pixelLeft+=20;
}
   
//Hide or show the text box
function showHide()
{
  if(isNetscape)
  {
    //If text box is currently hidden then make it visible
    if(document.layers.textBox.visibility == "hide")
      document.layers.textBox.visibility="inherit";
    else
      document.layers.textBox.visibility="hide";
  }
  if(isMicrosoft)
  {

    //If text box is currently hidden then make it visible
    if(document.all.textBox.style.visibility == "hidden")
      document.all.textBox.style.visibility="visible";
    else
      document.all.textBox.style.visibility="hidden";
  }
}
   
//-->
</script>
   
</body>
</html>

           
       










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7.Accessing Layers with JavaScript
8.'layer' and 'ilayer' Tag Properties
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10.Comparison of Layer and Clip Location Properties (W3C)
11. Testing Nested Layer Coordinate Systems (W3C)
12.Nested Layer Visibility Relationships (W3C)
13.Relationships Among zIndex Values (W3C)
14.Dragging a Layer (W3C)
15.Resizing a Layer (W3C)
16.Methods and Properties of the Layer Object
17.Layer seek