pic1= new Image(); 
pic1.src="images/left_menu/expertise/busi_on.gif";

pic2= new Image(); 
pic2.src="images/left_menu/expertise/comm_on.gif";

pic3= new Image(); 
pic3.src="images/left_menu/expertise/ener_on.gif";

pic4= new Image(); 
pic4.src="images/left_menu/expertise/eng_on.gif";

pic5= new Image(); 
pic5.src="images/left_menu/expertise/envi_on.gif";

pic6= new Image(); 
pic6.src="images/left_menu/expertise/real_on.gif";

pic7= new Image(); 
pic7.src="images/left_menu/expertise/soc_on.gif";

pic8= new Image(); 
pic8.src="images/left_menu/expertise/tran_on.gif";