A complex .htacces

I need the code for a .htaccess file that satisfies the following condition...

if($url == http://jolchobi.com)
{
redirect to http://www.jolchobi.com
}
else if($url == http://jolchobi.com/*)
{
redirect to http://ecards.cjolchobi.com/*
}

i.e. in simple english...

naked domain http://jolchobi.com or http://jolchobi.com/ will be redirected to http://www.jolchobi.com

if there is anything after jolchobi.com, e.g. http://jolchobi.com/fairy.php or http://jolchobi.com/chobi.php?c=mhl&p=004.jpg&t=Subho+Mahalaya.+Pujo+valo+katuk. will be redirected to http://ecards.jolchobi.com/fairy.php or http://ecards.jolchobi.com/chobi.php?c=mhl&p=004.jpg&t=Subho+Mahalaya.+Pujo+valo+katuk. respectively...

 

not sure if it works or nor but you can try this

RewriteEngine on


RewriteCond %{REQUEST_URI} ^.+ [NC]
RewriteRule (.*) http://ecards.jolchobi.com/$1 [R=301,L]


RewriteCond %{HTTP_HOST} ^jolchobi\.com [NC]
RewriteRule (.*) http://www.jolchobi.com/$1 [R=301,L]

Code (markup):

 

Thanks for the code. But this was not working

Have done it using PHP...