JspBar3dChart is a free JSP chart component which can generate 3D bar chart easily.See the sample chart below.This product was developed by  jvsoft and we had bought the exclusive right from it. We decide  to make it open source soon

Output Using URL Variable Overview

When we need pass variable to another page,just like jsp or asp,we can add a series of name-value pairs to the end of the URL in the following form:

http://www.devx.biz/index.html?category=value1&item=value2&...

Javascript location.reload

The reload method forces a reload of the window's current document,You can both provide a simple link that the user can click on to call the Javascript function and set a timer that calls the location.reload function at a specified interval.

The following example tell you how to use Javascript's location.reload in a link:

<a href="javascript:location.reload();">Refresh</a>

Javascript Alerting the User

The window object provides the alert method, which allows you to display a simple dialog box containing a text message followed by a single button the user can use to acknowledge the message and close the dialog box.