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标题: 网页之不断弹射的文字-特效 [打印本页]

作者: zw2004 时间: 2008-1-21 20:55 标题: 网页之不断弹射的文字-特效

<style type="text/css">
#supertext {1 y. C3 Z# e0 R: |' H
position:absolute;
left:0;) W- b- r# E' n5 g; Z
top:0;: K9 p2 F0 @! m3 \6 `" o; m! |7 J
visibility:hide;
visibility:hidden;
}
</style>
<script language="JavaScript1.2">0 u/ t7 F# e) _+ D! ^1 u
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var thecontent='<h2><font size="2" face="宋体" color="FF0000">欢迎光临七色风网页家园</font></h2>'
var hidetimer='';
/ F0 y( O- Z5 R6 V9 w
var BallSpeed = 20;' _6 Y+ v) X1 P  }6 [* }
var contentWidth;" @* p7 S9 [5 {1 N/ ?1 V
var contentHeight;
var maxBallSpeed = 50;
5 _% C- o6 }' T* M  X6 P# _

var xMax;2 |6 w4 m% {9 @, K0 K
var yMax;5 W! F' |% o4 ?" G
var xPos = 0;1 f  u$ i( \4 Q, Z, [5 _
var yPos = 0;$ Z; @9 ~8 H- u2 g6 Q3 p
var xDir = 'right';
var yDir = 'down';1 e- m) f" i+ E* X, z' V' S
var superballRunning = true;
var tempBallSpeed;0 G7 Y  l1 ^2 V2 x$ g/ F
var currentBallSrc;
var newXDir;
var newYDir;# o6 r9 T+ I* p9 z6 Y9 {8 m9 ?
+ v( T- n# Y6 p5 C% J" W
function initializeBall() {; B% P* Y6 d4 {
if (document.all) {
   xMax = document.body.clientWidth7 n2 m/ d* V2 q+ U7 i
   yMax = document.body.clientHeight
   document.all("supertext").style.visibility = "visible";3 R7 Z7 b7 a" X( f; A
   contentWidth=supertext.offsetWidth0 S/ C: ^& c6 y; L3 Z) s' j1 u
   contentHeight=supertext.offsetHeight
   }
else if (document.layers) {/ V4 h1 \( K+ C/ Z# q! `
   xMax = window.innerWidth;1 C, i- T4 T1 _  q9 Q1 J( `0 y
   yMax = window.innerHeight;
   contentWidth=document.supertext.document.width/ y2 x' L0 w: ^1 J# l
   contentHeight=document.supertext.document.height  a6 l6 Q" l! L* b
   document.layers["supertext"].visibility = "show";
   }
setTimeout('moveBall()',400);
if (hidetimer!='')
setTimeout("hidetext()",hidetimer)
}
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function moveBall() {
if (superballRunning == true) {( s, N# Q+ X+ A
   calculatePosition();; Z7 w! D: Y& s% q& D- T
   if (document.all) {
      document.all("supertext").style.left = xPos + document.body.scrollLeft;
      document.all("supertext").style.top = yPos + document.body.scrollTop;
      }2 g2 ^" k, W; ?7 s' e0 c
   else if (document.layers) {
      document.layers["supertext"].left = xPos + pageXOffset;! W3 a+ Q: B7 X+ Z( V
      document.layers["supertext"].top = yPos + pageYOffset;
      }
   animatetext=setTimeout('moveBall()',20);
   }, h! i0 z0 h/ r7 `4 t
}; {# A6 T& V; U, l" b8 o

function calculatePosition() {
if (xDir == "right") {
   if (xPos > (xMax - contentWidth - BallSpeed)) {
      xDir = "left";" I9 T- f% O% C2 t& S/ c
      }
   }, H- E) ^1 M' V1 p$ I- N
else if (xDir == "left") {
   if (xPos < (0 + BallSpeed)) {7 M# p. a2 a# }, \8 x7 E9 W7 t
      xDir = "right";6 \6 B% Z; N2 i1 z$ D. G' X
      }6 B7 {8 W3 v3 {# v% E3 ^8 f/ h
   }
if (yDir == "down") {- R" @0 M7 q( T6 g0 I+ c7 c
   if (yPos > (yMax - contentHeight - BallSpeed)) {0 L9 P5 O2 a1 a( B
      yDir = "up";+ h% N: t$ R6 H) S: N6 a
      }: O- c, L, Q- S. O
   }
else if (yDir == "up") {2 o. V/ M9 @2 b) u* \( v
   if (yPos < (0 + BallSpeed)) {: z% h5 `9 }: e" X& w2 Z
      yDir = "down";- G5 l3 Y* }! |) v. K7 H
      }! s. J! F$ o7 x$ |
   }
if (xDir == "right") {1 B7 J$ ^+ y3 l
   xPos = xPos + BallSpeed;
   }# P3 a8 r0 d8 b6 T' u) |- U( R
else if (xDir == "left") {4 F9 k8 |& C2 e5 q
   xPos = xPos - BallSpeed;
   }) D  l) p+ s# \% `: p, z# e
else {
   xPos = xPos;
   }
if (yDir == "down") {* z, H) h& k, R; }: k
   yPos = yPos + BallSpeed;
   }
else if (yDir == "up") {1 J: W9 p/ F0 ]
   yPos = yPos - BallSpeed;
   }6 s% c1 [0 J& T4 i0 y
else {, u- C: h. w9 W* S1 I' T. R$ w8 U
   yPos = yPos;
   }1 e- l6 w. @1 J% p0 W. S
}
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function hidetext(){
if (document.all)/ j  {$ r! ?: m1 G0 D  A: ^
supertext.style.visibility="hidden"
else if (document.layers)
document.supertext.visibility="hide"
clearTimeout(animatetext)
}7 c8 X0 l  S/ V& ^- m# i' i) e7 p  V' C
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if (document.all||document.layers){
document.write('<span id="supertext"><nobr>'+thecontent+'</nobr></span>')3 U! d( ]5 H( D( k9 y! _
window.onload = initializeBall;3 H3 C  u! b2 J% Q+ K# S7 I
window.onresize = new Function("window.location.reload()");
}

</script>

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