Use position:absolute or position:fixed
Absolute
<div id="socialnetworks">
<a href="http://www.linkedin.com/profile/view?id=215921152" target="_blank"><img src="images/linkedin.png" width="40px" height="40px" alt="linkedin"></a>
<a href="http://www.facebook.com/whoisthecoolestpersonalive" target="_blank"><img src="images/facebook.png" width="40px" height="40px" alt="facebook" ></a>
<a href="https://twitter.com/GintherTheGreat" target="_blank" alt="twitter"><img src="images/twitter.png" width="40px" height="40px"></a>
</div>
#socialnetworks {
position:absolute; bottom:5px; left:16px;
}
This will place it in the bottom left corner and stays there unless the content on the left gets larger.
If you with to keep it in the bottom left at all time use fixed
.
Fixed
<div id="socialnetworks">
<a href="http://www.linkedin.com/profile/view?id=215921152" target="_blank"><img src="images/linkedin.png" width="40px" height="40px" alt="linkedin"></a>
<a href="http://www.facebook.com/whoisthecoolestpersonalive" target="_blank"><img src="images/facebook.png" width="40px" height="40px" alt="facebook" ></a>
<a href="https://twitter.com/GintherTheGreat" target="_blank" alt="twitter"><img src="images/twitter.png" width="40px" height="40px"></a>
</div>
#socialnetworks {
position:fixed;
bottom:5px;
left:16px;
}