This article mainly explains the benefits of using DIV to write dynamic content to IFRAME. I shall also guide you in developing your own library of functions to work with IFRAME effectively.
All of the examples in this article (except for the ones in the last two sections) can be directly tested by simply copying and pasting all of the code in each section into any text file, saving it with the extension .HTM, and opening it using a browser.
Using a DIV as variable to write into IFRAME
I already introduced you to writing dynamic content with IFRAME using JavaScript in last week's article. I strongly suggest you refer to the previous article, if you are new at using JavaScript with IFRAME.
In this article, we shall focus on using DIV as a template of information to write to IFRAME. To be frank, I got this technique from one of my friend and I really want to share the same with all of you. I must congratulate him for coming up with such an innovative idea.
Now, let us try to develop a simple script (JavaScript) which shows the technique of using DIV with IFRAME. The entire code for the sample is as follows:
<html>
<head>
<meta name=vs_targetSchema
<script id="clientEventHandlersJS" language="javascript">
<!--
function Show()
{
var tDiv = document.getElementById("dvSample");
var FirstElement = tDiv.firstChild;
var v = FirstElement.nodeValue;
var tFrame = document.getElementById("myFrame");
var doc = tFrame.contentDocument;
if (doc == undefined || doc == null)
doc = tFrame.contentWindow.document;
doc.open();
doc.write(v);
doc.close();
document.all.myFrame.style.visibility="visible";
}
function Button1_onclick() {
Show();
}
//-->
</script>
</head>
<body>
<div id="dvSample">
<!--
<html>
<body>
Hai, this is from Div!
</body>
</html>
-->
</div>
<iframe id="myFrame" frameborder="0" vspace="0" hspace="0" marginwidth="0"
marginheight="0" width="100" scrolling=yes height="100"
style="BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; Z-INDEX: 999; LEFT: 20px; BORDER-LEFT: black 1px solid; BORDER-BOTTOM: black 1px solid; POSITION: absolute; TOP: 100px; visibility:hidden;"></iframe>
<form id="form1">
<input type="button" value="Show" id="Button1" name="Button1" onclick="return Button1_onclick()">
</form>
</body>
</html>
Actually, within the above code, the “meta” tag is not necessary. Since I developed the above code using Visual Studio.NET 2003 Enterprise Architect, it was automatically added to provide its full-featured mechanisms.