setTimeout("sun_raft()",200);
setTimeout("sun_raft1()",400);
setTimeout("sun_raft2()",600);
setTimeout("sun_raft3()",800);
setTimeout("sun_raft4()",1000);
попробуй так
timer_a = setTimeout("sun_raft()",200);
timer_b = setTimeout("sun_raft1()",400);
timer_c = setTimeout("sun_raft2()",600);
timer_d = setTimeout("sun_raft3()",800);
timer_e = setTimeout("sun_raft4()",1000);