I'm trying to draw simple 2d things in my JSP application. I found this taglib on http://ditchnet.org/2d/ but it doesn't work as expected…
If I start my webapp I get the following error:

org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at
line 20

17:
18:

Hello World!

19:
20:
21:
22: // create red gradient paint
23: var color1 = new java.awt.Color(0xC80021);

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)

root cause

javax.servlet.ServletException: javax.servlet.jsp.JspException: Rhino encountered an error
while evaluating the JavaScript in the tag with id 'polygon': null

So it says my tag with polygon is null. But it's not as you all can see…
Anybody with a good idea? 🙂
Or maybe another solution for drawing 2d stuff in jsp?
Thanks!