#menu_itm1 a		{ background-image:url(../SI/images/menu_itm1.gif); }
#menu_itm1 a:hover	{ background-image:url(../SI/images/menu_itm1_over.gif); }
#menu_itm2 a		{ background-image:url(../SI/images/menu_itm2.gif); }
#menu_itm2 a:hover	{ background-image:url(../SI/images/menu_itm2_over.gif); }
#menu_itm3 a		{ background-image:url(../SI/images/menu_itm3.gif); }
#menu_itm3 a:hover	{ background-image:url(../SI/images/menu_itm3_over.gif); }