Here is a very simple example to pass variable value from one jsp to another jsp.
Main JSP where variables are initialized.
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title> Display</title>
</head>
<SCRIPT LANGUAGE="JavaScript">
var no = 4;
var eventName = new Array(no);
eventName[3] = "E1";
eventName[2] = "E2";
eventName[1] = "E3";
eventName[0] = "E4";
function getDetails()
{
//window.location = "./Timeline - All.html";
window.open('./child.jsp','','scrollbars=no,menubar=no,height=600,width=800,resizable=no,toolbar=no,location=no,status=no');
}
</SCRIPT>
<body>
<h1>Hello!</h1>
<form name ="f1" method="post">
<table border="0" cellpadding="30">
<tr>
<td>
<font size="3" face="arial" color="Black">Enter ID</font>
</td>
<td>
<input type="text" name="id">
</td>
</tr>
<tr>
<td>
<input type="button" value="Submit" name="showId" onclick="getDetails()"/>
</td>
</tr>
</table>
</form>
</body>
</html>
Child JSP where we get the values of main jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Child</title>
</head>
<SCRIPT LANGUAGE="JavaScript">
var no = 4;
var eventName = window.opener.eventName;
function getDetails()
{
for(i=0;i<no;i++) {
alert(eventName[i]);
}
}
</SCRIPT>
<body onload="getDetails()">
</body>
</html>
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