Xanga relies on your browser to have a good version of JavaScript. Sometimes, a computer will have an obsolete or broken version of JavaScript, thus resulting in Xanga's JavaScript not being able to work properly.

INTERNET EXPLORER ON WINDOWS

If you're using Internet Explorer on a Windows computer, you can update your JavaScript by installing the latest version of JavaScript for Windows, which Microsoft calls Jscript 5.6:

Internet Explorer on Windows 2000 or Windows XP
http://www.microsoft.com/downloads/details.aspx?displaylang=en&familyid=824b1bd4-b4d6-49d5-8c58-199bdc731b64

Internet Explorer on Windows 98, Windows ME or NT 4.0
http://www.microsoft.com/downloads/details.aspx?displaylang=en&familyid=c6504fd9-5e2c-45bf-9424-55d7c5d2221b

OTHER BROWSERS

If you’re using a browser other than Internet Explorer on Windows, you can update your JavaScript by installing the following Java engines:

NETSCAPE, MOZILLA, OPERA, ETC. ON WINDOWS
Download the Windows Java Virtual Machine version 1.4.2 by going to the following link and clicking on the DOWNLOAD link in the table called Download J2SE v 1.4.2_01” in the column marked JRE: http://java.sun.com/j2se/1.4.2/download.html

ALL MAC BROWSERS OS X VERSION 10.2.6 OR LATER
http://download.com.com/3000-2283-10228380.html?tag=lst-0-6
 
ALL MAC BROWSERS MAC OS 8.1 to OS 9.X
http://developer.apple.com/java/download.html
 
OTHER PLATFORMS BESIDES WINDOWS AND MACS
You can visit Sun’s Java site to find other Java Virtual Machines for other platforms: http://java.sun.com/j2se/1.4.2/download.html