Need help in php to enlarge Image

Hello!
I have a image hosting website script is tinpic clone .
I'm having trouble i don't know how to solve it.
Whenever user views a particular image For Example Check this link below:
http://www.imgtake.com/show-image.php?id=8bb41275045712ef633e96baded71812
When user clicks on image to enlarge image enlarge's in new tab. I want to enlarge the image in same tab.
How can i do this ?
Here is code In my Show image.php

echo "<br><br><a href='$image' title='Click here to see fullsize original image' target='_blank'>                  <img src='$image' border=1 width='$mainWidth' height='$mainHeight'>                  </a>";

PHP:

Please help me thankx

 

for starters remove target='_blank'

 

Thankx for replying image has started to open in same tab.
But as i mention i want to expand the image size in same tab without going to direct link
Like image is showing of size 800x600 but its original size is 1600x1200 it should enlarge in there what should i do for that?

 

<img src='$image' border=1 width='$mainWidth' height='$mainHeight'>

I can't see you code after parsing, but I imagine you would use css hover to change the width and height. If that can't be done, try changing with javascript.

 

Hi,

try include to your site one of these : 1stwebdesigner.com/css/fresh-jquery-image-gallery-display-solutions/

or select another jquery galery (use google)