JavaScript数组应用 可依次读取的公告栏文字

<title>JavaScript数组文字</title>
<script language="JavaScript">
var i = 0;
var TextNumber = -1;
var TextInput = new Object();
var HelpText="";
var Text = "";
var Speed=50;
var message=0;
var addPadding="
";
TextInput[0] = "庆祝日！";
TextInput[1] = "感谢广大朋友多年来的支持……";
TextInput[2] = "我们将一如继往继续为大家奉献更好的源码资源！";
TotalTextInput = 2; // (0, 1, 2)
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;
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();
}
}

function teletype()
{
if (TimerSet)
{
Text=rollMessage();
TimerId = setTimeout("teletype()", Speed);
document.forms[0].elements[0].value=Text;
}
}

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);
}

function initTeleType()
{
Text="
Manual Tele-Type Display";
document.forms[0].elements[0].value=Text;
}

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();
}
}
</script>
<form>
<table CELLSPACING="0" CELLPADDING="0" WIDTH="420">
<tr>
<td width="100%" colspan="3" valign="top"><div align="center"><textarea NAME="teletype" ROWS="3" COLS="49" wrap="yes"></textarea> </td>
</tr>
<tr align="center">
<td width="30%" bgcolor="#0000A0" valign="top"><input TYPE="text" value="共3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>




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如需引入外部Js需刷新才能执行]



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