icon = Array() ;

icon[0]=new Image;icon[0].src="t_schl/t_schl_08.gif" ;
icon[1]=new Image;icon[1].src="t_schl/t_schl2_08.gif" ;
icon[2]=new Image;icon[2].src="t_schl/t_schl_09.gif" ;
icon[3]=new Image;icon[3].src="t_schl/t_schl2_09.gif" ;

function seticon(position, flag) {
        document[position].src = icon[flag].src ;
}