how to avoid client side post back when href is clicked
<p>hi am using javascript for image slideshow. It displays images in thumbnail which has to display 1 to 4 images with next and previous button for all other images. I got a script to work above  functionality. When i click the any image in thumbnail, it should display original image in asp.net image control. I passed the image name in query string in anchor tag.</p>

<p>My problem is, when i click anchor tag, postback occurs on client side and tends to dipslay the thumbnail images from 1 to 4. I want to display the image and position of the thumbnail to the same. I want to prevent the postback occurs on client side. Any one please help on this.</p>
