I want to overlay a transparent image over my website post .
On clicking this transparent png image , it should be removed .
how is it possible with dreamweaver cs5.5.
Can you check if this tutorial helps you?
Do you mean you want to mask your entire website content by placing a transparent box or image showing a message and remove it on click?
Are you trying to just show a 'message' for people to read that they can close by clicking?
I don't know how your Wordpress is set up, but for example you can add <img> to single.php so that every single post will have the same <img>.
OK, it's not very complex in principal - here's a bare example (click on the image):
Hope you get the idea
To start off you need to add your PNG to the post pages. In your single.php add the image like this:
<?php the_content(); ?>
<img src="your-image.png" />