I have a link

<a align="right" href="http://www.google.com"><span class="plink">Click me</span></a>

Applied css:
.plink{
display:block;
margin-right: 25px;
background-color: green
}

I need to position this link on the right side of this page. It works only if i put align="right".It does not work otherwise. How do you position a link on the right end of the page.