10.2.21 substr方法.html

javascript即用即差核心对象手册

<script>
    var str="0123456789"
    with(document)
    {
       write("对比一<br>");
       write(str.slice(6));
       write("<br>");
       write(str.substr(6));
       write("<br>");
       write("对比二<br>");
       write(str.slice(3,6));
       write("<br>")
       write(str.substr(3,6));
       write("<br>")
       write(str.substr(3,6-3));     
    }
</script>