I downloaded joomla 1.5 and i successfully installed it but after i tried the url i.e to access the panel lots of codes appeared on the screen, dont knw why. Please tell me why. I was thinking it was the xammp version which i used. I used the 1.7 version to install joomla 1.5.
Actually, compare to joomla, why don't you try wordpress. It is more web developer-friendly as it is easier to manage. Moreover, the wordpress API can be easily found in wordpress.org or even wordpress.com. In addition, wordpress is provided with plenty of free framework supporting different child theme.