唉,怎么又是这个问题啊?http://www.csdn.net/expert/topic/1073/1073061.xml?temp=.1590235

解决方案 »

  1.   

    真的是问烂了
    你还是去搜索吧,不过还是给你个例子<script language = "JavaScript">
    var onecount;
    onecount=0;
    subcat = new Array();
            
    subcat[0] = new Array("ASP基础","2","1");
            
    subcat[1] = new Array("ASP应用","2","2");
            
    subcat[2] = new Array("ASP技巧","2","3");
            
    subcat[3] = new Array("性能优化","2","4");
            
    subcat[4] = new Array("安全加密","2","5");
            
    subcat[5] = new Array("XML相关","2","6");
            
    subcat[6] = new Array("全文检索","2","7");
            
    subcat[7] = new Array("客户端相关","2","8");
            
    subcat[8] = new Array("打印相关","2","9");
            
    subcat[9] = new Array("数据库相关","2","10");
            
    subcat[10] = new Array("入门教程","3","11");
            
    subcat[11] = new Array("FTP/HTTP/Debug","3","12");
            
    subcat[12] = new Array("XML应用","3","13");
            
    subcat[13] = new Array("图像处理","3","14");
            
    subcat[14] = new Array("数据库操作","3","15");
            
    subcat[15] = new Array("文件处理","3","16");
            
    subcat[16] = new Array("MS Access","5","17");
            
    subcat[17] = new Array("MS SQL","5","18");
            
    subcat[18] = new Array("DB2","5","19");
            
    subcat[19] = new Array("Oracle","5","20");
            
    subcat[20] = new Array("Application/Applet","4","21");
            
    subcat[21] = new Array("J2EE/EJB/服务器","4","22");
            
    subcat[22] = new Array("J2ME开发","4","23");
            
    subcat[23] = new Array("Java基础","4","24");
            
    subcat[24] = new Array("Java技巧及代码","4","25");
            
    subcat[25] = new Array("Jsp/Servlet","4","26");
            
    subcat[26] = new Array("正则表达式","2","27");
            
    subcat[27] = new Array("系统相关","2","28");
            
    subcat[28] = new Array("组件开发","2","29");
            
    subcat[29] = new Array("脚本编码","2","30");
            
    subcat[30] = new Array("远程脚本","2","31");
            
    subcat[31] = new Array("邮件相关","2","32");
            
    subcat[32] = new Array("FSO专题","2","33");
            
    subcat[33] = new Array(".NET概论及软件使用","1","34");
            
    subcat[34] = new Array("Asp.Net开发","1","35");
            
    subcat[35] = new Array("C#语言","1","36");
            
    subcat[36] = new Array("VB.net语言","1","37");
            
    subcat[37] = new Array("E-mail专题","1","38");
            
    subcat[38] = new Array("WebService","1","39");
            
    subcat[39] = new Array("winform应用","1","40");
            
    subcat[40] = new Array("window app开发","1","41");
            
    subcat[41] = new Array("winsock应用","1","42");
            
    subcat[42] = new Array("XML应用","1","43");
            
    subcat[43] = new Array("数据库应用","1","44");
            
    subcat[44] = new Array("综合应用","1","45");
            
    subcat[45] = new Array("OO相关","1","46");
            
    subcat[46] = new Array("文件操作","1","47");
            
    subcat[47] = new Array("算法/线程","1","48");
            
    subcat[48] = new Array("软件工程","1","49");
            
    subcat[49] = new Array("面向对象程序基础","1","50");
            
    subcat[50] = new Array("SOAP/UDDI/WSDL","1","51");
            
    subcat[51] = new Array("控件开发和使用","1","52");
            
    subcat[52] = new Array("MySQL","5","53");
            
    subcat[53] = new Array("Sybase","5","54");
            
    subcat[54] = new Array("DataWarehouse","5","55");
            
    subcat[55] = new Array("Replication","5","56");
            
    subcat[56] = new Array("Performance Turning","5","57");
            
    subcat[57] = new Array("FAQ","5","58");
            
    subcat[58] = new Array("邮件处理","3","59");
            
    subcat[59] = new Array("开发工具","4","60");
            
    subcat[60] = new Array("调试手记","4","61");
            
    subcat[61] = new Array("面向对象/设计","4","62");
            
    subcat[62] = new Array("企业级应用","4","63");
            
    subcat[63] = new Array("嵌入式开发","4","64");
            
    subcat[64] = new Array("Java与XML","4","65");
            
    subcat[65] = new Array("资料/其它","4","66");
            
    onecount=66;function changelocation(locationid)
        {
        document.myform.Nclassid.length = 0;     var locationid=locationid;
        var i;
        for (i=0;i < onecount; i++)
            {
                if (subcat[i][1] == locationid)
                { 
                    document.myform.Nclassid.options[document.myform.Nclassid.length] = new Option(subcat[i][0], subcat[i][2]);
                }        
            }
            
        }    
    </script><form method="post" name="myform" action="ru_query.asp">
    文章搜索:
    <select name="action" size="1">
    <option value="title">文章标题</option>
    </select>
    <select name="classid" onChange="changelocation(document.myform.classid.options[document.myform.classid.selectedIndex].value)" size="1">
    <option selected value="">未指定条件</option>
            
            <option value="1">.Net专区</option>
           
            
            <option value="2">ASP技术</option>
           
            
            <option value="3">PHP技术</option>
           
            
            <option value="4">JSP技术</option>
           
            
            <option value="5">数据库</option>
           
            
           </select> 
        
        <select name="Nclassid">                  
            <option selected value="">未指定条件</option>
        </select>
    <input type="text" name="keyword" class=smallinput size=10 value="关键字" maxlength="50">
    <input type="submit" name3