JS實作瀏覽器狀態列文字從右向左彈出效果代碼

JS實作瀏覽器狀態列文字從右向左彈出效果代碼_javascript技巧

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發布： 2016-05-16 15:34:57

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1408 人瀏覽過

本文實例講述了JS實作瀏覽器狀態列文字從右向左彈出效果。分享給大家參考，具體如下：

這裡狀態列文字彈出程式碼，從右向左彈出，透過修改Script中的這些程式碼片段可改變效果：

var POSITION = 100
var DELAY = 4
var MESSAGE = "這裡是你想要的文字！"

運作效果截圖如下：

線上示範網址如下：

http://demo.jb51.net/js/2015/js-status-bar-txt-scroll-codes/

具體程式碼如下：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>状态栏文字弹出代码，从右向左弹出</TITLE>
</HEAD>
<BODY>
<script language="JavaScript"> 
<!--
function statusMessageObject(p,d) {
 this.msg = MESSAGE
 this.out = " "
 this.pos = POSITION
 this.delay = DELAY
 this.i   = 0
 this.reset = clearMessage
}
function clearMessage() {
 this.pos = POSITION
}
var POSITION = 100
var DELAY  = 4
 var MESSAGE = "状态栏文字快速的一个一个弹出！！！  " 
var scroll = new statusMessageObject()
function scroller() {
 for (scroll.i = 0; scroll.i < scroll.pos; scroll.i++) {
  scroll.out += " "
 }
 if (scroll.pos >= 0)
  scroll.out += scroll.msg
 else scroll.out = scroll.msg.substring(-scroll.pos,scroll.msg.length)
 window.status = scroll.out
 scroll.out = " "
 scroll.pos--
 if (scroll.pos < -(scroll.msg.length)) {
  scroll.reset()
 }
 setTimeout ('scroller()',scroll.delay)
}
function snapIn(jumpSpaces,position) {
 var msg = scroll.msg
 var out = ""
 for (var i=0; i<position; i++) 
  {out += msg.charAt(i)}
 for (i=1;i<jumpSpaces;i++) 
  {out += " "}
 out += msg.charAt(position)
 window.status = out
 if (jumpSpaces <= 1) {
  position++
  if (msg.charAt(position) == ' ') 
   {position++ }
  jumpSpaces = 100-position
 } else if (jumpSpaces > 3)
    {jumpSpaces *= .75}
 else
  {jumpSpaces--}
 if (position != msg.length) {
  var cmd = "snapIn(" + jumpSpaces + "," + position + ")";
  scrollID = window.setTimeout(cmd,scroll.delay);
 } else {
  window.status=""
  jumpSpaces=0
  position=0
  cmd = "snapIn(" + jumpSpaces + "," + position + ")";
  scrollID = window.setTimeout(cmd,scroll.delay);
  return false 
 }
 return true
}
snapIn(100,0);
// -->
</script>
</BODY>
</HTML>

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希望本文所述對大家JavaScript程式設計有所幫助。