Working with Pop Ups and Browser Windows in JavaScript - How to access the data available in a pop up window from within the main window using JavaScript
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Now, let us try to develop a simple script (JavaScript) which writes user specified information to a pop up window dynamically. We shall even access the information available in pop up window from within the main window! Have a look at the following code:
<html>
<head>
<meta name=vs_targetSchema
content="http://schemas.microsoft.com/intellisense/ie5">
<script id="clientEventHandlersJS" language="javascript">
<!--
// global variable for subwindow reference
var w;
function openNewWindow( ) {
if (!w || w.closed) {
w = window.open("","NewWindow","status,height=200,width=300");
// delay writing until window exists in IE/Windows
setTimeout("openNewWindow( )", 50);
} else if (w.focus) {
// window is already open and focusable, so bring it to the front
w.focus( );
}
// assemble content for new window
var c = document.all.txtHTML.value;
// write HTML to new window document
w.document.write(c);
w.document.close( ); // close layout stream
}
function Button1_onclick() {
openNewWindow();
}
function Button2_onclick() {
alert(w.document.getElementById("txtName").value );
}
//-->
</script>
</head>
<body>
<form id="form1">
Enter HTML:<textarea id="txtHTML"
NAME="txtHTML"><html><head><title>My sub Window</title></head><body>Enter Name: <form id="Form1"><input
id="txtName" type=text></form></body></html></textarea><br>
<input type="button" value="Show" id="Button1"
name="Button1" onclick="return Button1_onclick()">
<input type="button" value="Get" id="Button2"
name="Button2" onclick="return Button2_onclick()">
</form>
</body>
</html>
This is another interesting concept pertaining to the use of pop up windows. We will certainly know about retrieving information available on the current web page. But, how about accessing the information available in a pop up window from within the main window? This section does the same.
The following is the function I used to achieve this:
functionButton2_onclick() {
alert(w.document.getElementById("txtName").value );
}
I am expecting that the pop up window contains a text box named "txtName" and I am trying to access the information available in it. To access the information in a pop up window from within the main window, we need to work with the "document" object of the pop up window. Once you get the "document" object, the rest of the routines will be very similar to the ordinary way we implement in main windows.
Next: How to access the data available in the main window from within a pop up window and vice versa using JavaScript >>
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