HOW TO OPEN POPUP USING JAVASCRIPT

<a href="#" onclick="OpenWindow()">Insert Data
<script language="javascript" type="text/javascript">
function OpenWindow()
{
    window.open ("PopUpWindow.aspx",
       "mywindow", "menubar=0,resizable=0," + 
       "width=350,height=250,toolbars=0");

}
</script>