<script type="text/javascript">
    var  s=100000;
    var  g=0;
    while(s>0){
        g++;
        if(s>50000){
            s=s-s*0.05;
        }else if(s<=50000){
            s=s-5000;
        }else{
            document.write(g);
        }
        
    }
</script>   我这样写没有任何结果是怎么回事。