如何让它不重复出现，求大神帮助

请问你指的是不重复出现是什么意思呢？index = Math.floor(Math.random() * tips. length);这段代码有什么含义吗？还有你是想得到tips数组中的一个呢？还是逗得到？

解决方案 »

  1.   

    楼主用cookie试试。<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
            <title>无标题文档</title>
        </head>    <body>
            <script Language="JavaScript">
                function setCookie(name, value) {
                    var exp = new Date();
                    exp.setTime(exp.getTime() + 20 * 1000);
                    //cookie 保存20秒
                    document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
                    document.cookie = name + "=" + value;
                }            function getCookie(name) {
                    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
                    if (arr != null)
                        return unescape(arr[2]);
                    return '';
                }            function delCookie(name)//删除cookie
                {
                    var exp = new Date();
                    exp.setTime(exp.getTime() - 1);
                    var cval = getCookie(name);
                    if (cval != null)
                        document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
                }
          
                function hasEmpty(){  //判断数组元素是否还存在没存到cookie里的。
                    for(i=0;i<9;i++){
                        if(getCookie(i) == ''){
                            return true;
                        }
                    }
                }
                tips = new Array(9);
                tips[0] = "金麟岂是池中物(1)";
                tips[1] = "一遇风云变化龙(2)";
                tips[2] = "左青龙(3)";
                tips[3] = "右白虎(4)";
                tips[4] = "前朱雀(5)";
                tips[5] = "后玄武(6)";
                tips[6] = "老牛在腰间(7)";
                tips[7] = "床前明月光(8)";
                tips[8] = "飞流直下三千尺(9)";            while(hasEmpty()) {
                    index = Math.floor(Math.random() * tips.length);
                    if (getCookie(index) == '') {
                        setCookie(index, index);
                        document.write("<FONT SIZE=8 COLOR=DARKBLUE>" + tips[index] + "</FONT>");
                        break;
                    }
                }
            </Script>
        </body>
    </html>