#mainpage_image
{
   background-image: url(JLH_MainPage.png);
   position: relative;
   height: 600px;
   width:  600px;
}

#menu a
{
   position: absolute;
   height: 100px;
   width:  100px;
   top:    250px;
   text-decoration: none;
}

#menu a i 
{
   visibility: hidden;
}

a#delta
{
   left: 115px;
}

a#mu
{
   left: 250px;
}

a#om
{
   left: 385px;
}

a#beta
{
   left: 475px;
   top:  475px;
}

a#delta:hover { background-image: url(JLH_MainPage_Delta.png); border: none;}
a#mu:hover    { background-image: url(JLH_MainPage_Mu.png); border: none;}
a#om:hover    { background-image: url(JLH_MainPage_Om.png); border: none;}
a#beta:hover  { background-image: url(JLH_MainPage_Beta.png); border: none;}