图片在特定的时间自动消失 dn001 2009-06-21 08:27:58 <!--脚本说明: 第一步：把如下代码加入<head>区域中--> <script language="JavaScript"> <!-- Activate Cloaking Device var i = 0; // used to cycle thru messages var TextNumber = -1; // array of messages var TextInput = new Object(); // used to load manipulate message var HelpText=""; // used to load message var Text = ""; // length of timeout (smaller is faster) var Speed=50; // used to display message number var message=0; // used to position text in ver 2.0 var addPadding="rn"; // Each element of TextInput represents a single message. TextInput[0] = "欢迎您出次访问网页教学网"; TextInput[1] = "本站是一个专业网页教学站点,资源丰富"; TextInput[2] = "重点介绍网页制作网页特效网络编程动画制作"; TextInput[3] = "与制作网页制作密切相关的技术"; TextInput[4] = "本站同时有教程下载等栏目"; TextInput[5] = "还有新闻及服务方面的资料"; TextInput[6] = "本站提供服务包括为您建站出售程序英汉翻译"; TextInput[7] = "本站网址：http://www.knowsky.com"; TotalTextInput = 7; // (0, 1, 2, 3, 4, 5, 6, 7) // Positioning and speed vary between versions. var Version = navigator.appVersion; if (Version.substring(0, 1)==3) { Speed=200; addPadding=""; } for (var addPause = 0; addPause <= TotalTextInput; addPause++) {TextInput[addPause]=addPadding+TextInput[addPause];} var TimerId var TimerSet=false; // Called by >>> button (display next message) . function nextMessage() { if (!TimerSet) { TimerSet=true; clearTimeout (TimerId); if (TextNumber>=TotalTextInput) { alert("This is the end of the list!"); TimerSet=false; } else { TextNumber+=1; message=TextNumber+1; document.forms[0].elements[2].value= message; Text = TextInput[TextNumber]; HelpText = Text; } teletype(); } } // Gets and displays character from rollMessage() . // Variable Speed controls length of timeout and thus the speed of typing. function teletype() { if (TimerSet) { Text=rollMessage(); TimerId = setTimeout("teletype()", Speed); document.forms[0].elements[0].value=Text; } } // Pulls one character at a time from string and returns (as Text) to function teletype() for displaying. function rollMessage () { i++; var CheckSpace = HelpText.substring(i-1, i); CheckSpace = "" + CheckSpace; if (CheckSpace == " ") {i++;} if (i >= HelpText.length+1) { TimerSet=false; Text = HelpText.substring(0, i); i=0; return (Text); } Text = HelpText.substring(0, i); return (Text); } // Initially called by onLoad in BODY tag to load title. function initTeleType() { Text="rn Manual Tele-Type Display"; document.forms[0].elements[0].value=Text; } // Called by <<< button (get previous message). function lastMessage() { if (!TimerSet && TextNumber!=-1) { TimerSet=true; clearTimeout (TimerId); if (TextNumber<=0) { alert("This is the beginning of the list!"); TimerSet=false; } else { TextNumber-=1; message=TextNumber+1; document.forms[0].elements[2].value= message; Text = TextInput[TextNumber]; HelpText = Text; } teletype(); } } // Deactivate Cloaking --></script> <!--第二步：在<body>区域中加入如下代码:--> <form> <table CELLSPACING="0" CELLPADDING="0" WIDTH="17%"> <tr> <td width="100%" colspan="3" valign="top"><div align="center"><p><textarea NAME="teletype" ROWS="3" COLS="28" wrap="yes"></textarea> </td> </tr> <tr align="center"> <td width="40%" valign="top" bgcolor="#0000A0"><input TYPE="button" VALUE="公告栏" onClick="lastMessage()"></td> <td width="30%" bgcolor="#0000A0" valign="top"><input TYPE="text" value="共8条" SIZE="5" name="1"></td> <td width="30%" bgcolor="#0000A0" valign="top"><input TYPE="button" VALUE="阅 读" onClick="nextMessage()"></td> </tr> </table> </form>
