Load the link in a div tag

Question

 <a href="WebForm1.aspx">Form1</a>
<a href="WebForm2.aspx">Form2</a>
<a href="WebForm3.aspx">Form3</a>
<div id="content"> </div>

Here I have Three links in my page .If i click the link it will go to the assigned page .Now i want to load this page into my div tag.