JavaScript (JS) protocol Example: HTML DOM Objects – Area Object – JavaScript (JS) protocol Example
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JavaScript (JS) protocol Example: HTML DOM Objects – Area Object – JavaScript (JS) protocol Example
Purpose: – Illustrates the JavaScript syntax for the Area Object protocol Property .
Prerequistes:
- Install Visual Web Developer 2008
Syntax: AreaObject.protocol="protocol" – Allows you to access the protocol of url for an AreaObject. protocol is what is after domain name in url.
Restrictions: None
Notes:
- You can build your own library of syntax examples by using same web site over and over and just add new files to it.
Instructions:
- Use Visual Web Developer 2008
- Create new web site;
- Click File/New Web Site
- Select ASP.NET Website Template
- Select C-Sharp for language
- name of Web Site could be JavaScript_Syntax.
- Add New folder named "HTMLDOMObjects"
- Right-click project name in solution explorer;
- add new folder;
- name of folder should be: HTMLDOMObjects
- Add New subfolder to "HTMLDOMObjects" folder named "DOMArea"
- Right-click folder named "HTMLDOMObjects" in solution explorer;
- add new folder;
- name of folder should be: DOMArea
- Add New subfolder to "DOMArea" subfolder named "AreaObjectProperties"
- Right-click subfolder named "DOMArea" in solution explorer;
- add new folder;
- name of folder should be: AreaObjectProperties
- Add HTML Page Named protocol to AreaObjectProperties subfolder
- Right-click AreaObjectProperties subfolder;
- add new item;
- Select HTML Page
- HTML Page name should be protocol
- Click on copy code in code below to copy code into HTML Page protocol.htm
- Right-click on HTML page protocol.htm and select view in browser
| HTML | | copy code | | ? |
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
<html> |
<head> |
<title>IdealProgrammer.com: protocol</title> |
<!-- |
*************************************************** |
* This example is from http://idealprogrammer.com * |
*************************************************** |
Note: |
coords for rect = "upperleftx,upperlefty,bottomrightx,bottomrighty" |
coords for circle = x,y,r where x and y are center and r is radius |
coords for poly = x1,y1,x2,y2,... |
--> |
</head> |
<body> |
<a href="http://idealprogrammer.com">Ideal Programmer</a><br /><br /> |
<img src ="http://idealprogrammer.com/wp-photos/goldbottle.jpg" width="200" height="200" alt="Planets" |
usemap ="#goldmap" /><br /> <br /> |
<map name="goldmap" id="goldmapid"> |
<area id="Area1" shape="rect" coords="0,0,100,100" href="http://www.google.com/index.html" alt="google" accesskey="1" /> |
<area id="Area2" shape="rect" coords="100,0,200,100" href="http://www.yahoo.com" alt="yahoo" accesskey="2" /> |
<area id="Area3" shape="rect" coords="0,100,100,200" href="http://idealprogrammer.com/about" alt="idealprogrammer" accesskey="3" /> |
<area id="Area4" shape="rect" coords="100,100,200,200" href="http://myqol.com/default.aspx" alt="progressmonitor" accesskey="4" /> |
</map> |
<script type="text/javascript"> |
//***************************************************** |
// DOM Objects |
//***************************************************** |
//***************************************************** |
// *** Area Object Property *** |
//***************************************************** |
//***************************************************** |
// protocol |
//***************************************************** |
// SYNTAX: |
// areaObject.protocol="protocol" Allows you to access the protocol |
// of the url for an areaObject in an image map. Protocol |
// can be http, https, etc. |
// Two ways to retrieve protocol |
// 1. GetElementsByTagName |
myObject = document.getElementsByTagName('area')[0]; |
document.write("Area1 - Using getElementsByTagName : " + myObject.protocol); |
document.write("<br />"); |
// 2. GetElementById |
document.write("Area2 - Using getElementById: "); |
document.write(document.getElementById('Area2').protocol); |
document.write("<br /><br />"); |
// Two ways to assign protocol |
// 1. GetElementById |
myArea3 = document.getElementById('Area3'); |
myArea3.protocol = "https"; |
document.write("<br />Area3 changed to protocol: ", myArea3.protocol); |
// 2. GetElementsByTagName |
myArea4 = document.getElementsByTagName('area')[3]; |
myArea4.protocol = "ftp"; |
document.write("<br />Area4 changed to protocol: ", myArea4.protocol) |
</script> |
</body> |
</html> |
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