Hi there. Working on my site currently and I would like to know how I can use this code more than once on the page

Code:
<script language="JavaScript">
<!-- 
// This is the function that will open the
// new window when the mouse is moved over the link
function open_new_window() 
{
new_window = open("","hoverwindow","width=300,height=200,left=10,top=10");
...