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 Learn JAVA Script - BASICS

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devendra
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Posts : 3
Join date : 2010-09-21

PostSubject: Learn JAVA Script - BASICS   Wed Sep 22, 2010 3:49 am

Question Question Question Question

<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
<!-- Beginning of JavaScript -
function MsgBox (textstring) {
alert (textstring) }
// - End of JavaScript - -->
</SCRIPT>
</HEAD>
<BODY>
<FORM>
<INPUT NAME="text1" TYPE=Text>
<INPUT NAME="submit" TYPE=Button VALUE="Show Me" onClick="MsgBox(form.text1.value)">
</FORM>
</BODY>
</HTML>

BREAK DOWN of CODE

In the <HEAD> area, a new pair of tags has been introduced: <SCRIPT> and </SCRIPT>

All browsers currently assume you are programming in JavaScript, but other programming languages might come along in the future. As a result, it is standard form to open your scripting area with:
<SCRIPT LANGUAGE="JavaScript">

You can name your functions anything you want. I chose to name mine MsgBox, but I could have named it Kalamazu or something else.

A function is typed like this:



function MyFunction (variable) {

(stuff you want to do with the variable)
}
This animation shows how a number can be passed to the variable "data" and then used in a function written for that variable.

The variable can be a number, a piece of text, or a date.
The curly brackets { } define the beginning and end of the function.

--------------------------------------------------------------------------------

The alert command will create an message box displaying a piece of text or a number.
Alert("Hello World") will display Hello World in the box.
Alert(SomeText) will assume that SomeText is a variable, and will display whatever value it contains. Notice that "Hello World" was in quotes and SomeText was not. If I put these two lines together:
SomeText="My Three Sons"
Alert(SomeText)
then My Three Sons will be displayed in the message box.
--------------------------------------------------------------------------------
<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
< !-- Beginning of JavaScript -
function MsgBox (textstring) {
alert (textstring) }
// - End of JavaScript - -->
</SCRIPT>
</HEAD>


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Join date : 2010-09-20
Age : 28
Location : mumbai

PostSubject: Re: Learn JAVA Script - BASICS   Wed Sep 22, 2010 3:51 am

nyc share devendra... keep sharing more codes and scripts Very Happy

for simple alert message box we can also use a script of few lines as follows Wink
==============================================================================================
<script language = "javascript">
<!--
alert(" msg text")
//-->
</script>
==============================================================================================

by including this script whenever anyone will visit your site, the visitor will get the alert message box with the msg text you provided... Wink

ENJOY.... Wink
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