//=======================================================
//define rollover images and rollover text
        //topnav
		b20on = new Image();		b20on.src = "/images/buttons/btn2_stn_site_over.gif";  
		b21on = new Image();		b21on.src = "/images/buttons/btn2_water_ef_over.gif";  
		b22on = new Image();		b22on.src = "/images/buttons/btn2_engatm_over.gif";
		b23on = new Image();		b23on.src = "/images/buttons/btn2_mtrsrc_over.gif";
		b24on = new Image();		b24on.src = "/images/buttons/btn2_indrqt_over.gif";
		b25on = new Image();		b25on.src = "/images/buttons/btn2_inovt_over.gif";
	
		
		//leftnav off
		b20off = new Image();		b20off.src = "/images/buttons/btn2_stn_site.gif";
		b21off = new Image();		b21off.src = "/images/buttons/btn2_water_ef.gif";
	    b22off = new Image();		b22off.src = "/images/buttons/btn2_engatm.gif";
	    b23off = new Image();		b23off.src = "/images/buttons/btn2_mtrsrc.gif";
	    b24off = new Image();		b24off.src = "/images/buttons/btn2_indrqt.gif";
	    b25off = new Image();		b25off.src = "/images/buttons/btn2_inovt.gif";