if (document.images) {
    homebuttonup       = new Image();
    homebuttonup.src   = "http://www.rhythmsnowboards.com/wp-content/themes/rhythm2012/images/rhythm_2012_logo.png" ;
    homebuttondown     = new Image() ;
    homebuttondown.src = "http://www.rhythmsnowboards.com/wp-content/themes/rhythm2012/images/handbuilt.png" ;
    
    buyup       	 = new Image();
    buyup.src        = "http://www.rhythmsnowboards.com/wp-content/themes/rhythm2012/images/cart_icon.png" ;
    buydown          = new Image() ;
    buydown.src      = "http://www.rhythmsnowboards.com/wp-content/themes/rhythm2012/images/cart_icon_rollover.png" ;
    
    aboutup       	 = new Image();
    aboutup.src        = "http://www.rhythmsnowboards.com/wp-content/themes/rhythm2012/images/icons/about_icon.gif" ;
    aboutdown          = new Image() ;
    aboutdown.src      = "http://www.rhythmsnowboards.com/wp-content/themes/rhythm2012/images/icons/about_icon_rollover.gif" ;
}

function buttondown( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "down.src" );
    }
}
function buttonup ( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "up.src" );
    }
}