function rdn_flash120() {
              var num_flashes = 4
             ran = Math.round(Math.random() * (num_flashes-1))+1
            if (ran == 1) 
                rdn_flash120="http://www.portalrondonia.com/adstream/comercial_catarinense.gif"
            if (ran == 2) 
                rdn_flash120="http://www.portalrondonia.com/adstream/comercial_catarinense.gif"
        	if (ran == 3) 
                rdn_flash120="http://www.portalrondonia.com/adstream/comercial_catarinense.gif"	
				 if (ran == 4) 
                rdn_flash120="http://www.portalrondonia.com/adstream/comercial_catarinense.gif"
 
            return rdn_flash120;
            
            }
            
             fla=rdn_flash120()
            
					document.write("<a href=http://www.ccatarinense.com.br><img src=\"" +  fla + "\" width=\"120\" height=\"60\" height=\"0\"/></a>");