function fadedivs() {
   $('#commercial').animate({opacity: '.5'}, {duration: 400});
   $('#fineart').animate({opacity: '.7'}, {duration: 400});
}

function commfade() {
   $('#commlink').mouseenter(function(){
      $('#commercial').animate({opacity: '1'}, {duration: 400});
   }); 
   $('#commlink').mouseleave(function(){
      $('#commercial').animate({opacity: '.5'}, {duration: 400});
   });
}

function fineartfade() {
   $('#fineartlink').mouseenter(function(){
      $('#fineart').animate({opacity: '1'}, {duration: 400});
   }); 
   $('#fineartlink').mouseleave(function(){
      $('#fineart').animate({opacity: '.7'}, {duration: 400});
   });
}

$(document).ready(function(){
	fadedivs();
	commfade();
	fineartfade();
 });