]<script>
if(document.layers)
{
alert("将窗口缩小一些,才可以看到效果!");
}
function drop(n) {
if(self.moveBy){
self.moveBy (0,-900);
for(i = n; i > 0; i--){
self.moveBy(0,3);
}
for(j = 8; j > 0; j--){
self.moveBy(0,j);
self.moveBy(j,0);
self.moveBy(0,-j);
self.moveBy(-j,0);
}
}
}
</script>