How to set a automatically base url?

[eluser]UdayD[/eluser]
hi!

i just wrote a code in a view and have set a base url as below:

Code:

<base href="<?php echo "$base"; ?>">

now when i load an image in my view i have given like this

<img src="echo $base/images; /catch-me.gif" alt="catch-me"/>

but i have to write
like this
<img src="images/catch-me.gif" alt="catch-me"/>

i mean that can't it set the base url automatically like normally we do when we are developing a project.
now i have to write as
sorry to sttach the sample file because it was not getting pasted over here!