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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- saved from url=(0032)http://www.ie-zone.com/index.php --><HTML><!-- #BeginTemplate "/Templates/JsExample.dwt" --><HEAD><!-- #BeginEditable "doctitle" --> <TITLE>模仿Flash效果之二</TITLE><!-- #EndEditable --> <META http-equiv=Content-Type content="text/html; charset=gb2312"><LINK href="fav.ico" rel="shortcut icon"><STYLE type=text/css>BODY { MARGIN: 25px 25px 25px}#all TD { FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: "Verdana", "Arial","新宋體", "宋體"}INPUT { FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: "Verdana", "Arial","新宋體", "宋體"}SELECT { FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: "Verdana", "Arial","新宋體", "宋體"}P { FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: "Verdana", "Arial","新宋體", "宋體"}TEXTAREA { FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: "Verdana", "Arial","新宋體", "宋體"}#all A:active { COLOR: #7d070c}#all A:visited { COLOR: #7d070c}#all A:hover { COLOR: #336699}#all A:link { COLOR: #7d070c}</STYLE><SCRIPT language=JavaScript><!--function MM_goToURL() { //v3.0 var i, args=MM_goToURL.arguments; document.MM_returnValue = false; for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");}function JM_cc(ob){ob.select();js=ob.createTextRange();js.execCommand("Copy");}//--></SCRIPT><META content="MSHTML 5.50.4134.600" name=GENERATOR></HEAD><BODY id=all text=#000000 bgColor=#336699><TABLE cellSpacing=0 cellPadding=0 width="100%" border=0> <TR bgColor=#ffffff> <TD><IMG src="../images/sq_1.gif" width=11 height="14"></TD> <TD width="100%"></TD> <TD><IMG src="../images/sq_2.gif" width=11 height="14"></TD> </TR></TABLE><!-- #BeginEditable "Example%20and%20Sources" --> <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0> <TR bgColor=#ffffff> <TD><IMG src="../images/space.gif" width=11 height="1"></TD> <TD width="100%"> <table width="100%" border="0" cellpadding="8"> <tr> <td align="center"><!-- #BeginLibraryItem "/Library/js_title.lbi" --><script language="JavaScript">document.write("<font color=#7d070c style=\"font-size: 14px\">"+document.title+"</font>");</script><!-- #EndLibraryItem --></td> </tr> <tr> <td bgcolor="#f7f7f7"> <div id=dot0 style="VISIBILITY: hidden; WIDTH: 11px; POSITION: absolute; HEIGHT: 11px"><img height=11 src="img/bullet1.gif" width=11></div> <div id=dot1 style="WIDTH: 11px; POSITION: absolute; HEIGHT: 11px"><img height=11 src="img/bullet1.gif" width=11></div> <div id=dot2 style="WIDTH: 11px; POSITION: absolute; HEIGHT: 11px"><img height=11 src="img/bullet1.gif" width=11></div> <div id=dot3 style="WIDTH: 11px; POSITION: absolute; HEIGHT: 11px"><img height=11 src="img/bullet1.gif" width=11></div> <div id=dot4 style="WIDTH: 11px; POSITION: absolute; HEIGHT: 11px"><img height=11 src="img/bullet1.gif" width=11></div> <div id=dot5 style="WIDTH: 11px; POSITION: absolute; HEIGHT: 11px"><img height=11 src="img/bullet1.gif" width=11></div> <div id=dot6 style="WIDTH: 11px; POSITION: absolute; HEIGHT: 11px"><img height=11 src="img/bullet1.gif" width=11></div> <script language=JavaScript><!-- hide codevar nDots = 7;if (document.all&&window.print)document.body.style.cssText="overflow-x:hidden;overflow-y:scroll"var Xpos = 0;var Ypos = 0; // fixed time step, no relation to real timevar DELTAT = .01; // size of one spring in pixelsvar SEGLEN = 10; // spring constant, stiffness of springsvar SPRINGK = 10; // all the physics is bogus, just picked stuff to // make it look okayvar MASS = 1;var GRAVITY = 50;var RESISTANCE = 10; // stopping criterea to prevent endless jittering // doesn't work when sitting on bottom since floor // doesn't push back so acceleration always as big // as gravityvar STOPVEL = 0.1;var STOPACC = 0.1;var DOTSIZE = 11; // BOUNCE is percent of velocity retained when // bouncing off a wallvar BOUNCE = 0.75;var isNetscape = navigator.appName=="Netscape"; // always on for now, could be played with to // let dots fall to botton, get thrown, etc.var followmouse = true;var dots = new Array();init();function init(){ var i = 0; for (i = 0; i < nDots; i++) { dots[i] = new dot(i); } if (!isNetscape) { // I only know how to read the locations of the // <LI> items in IE //skip this for now // setInitPositions(dots) } // set their positions for (i = 0; i < nDots; i++) { dots[i].obj.left = dots[i].X; dots[i].obj.top = dots[i].Y; } if (isNetscape) { // start right away since they are positioned // at 0, 0 startanimate(); } else { // let dots sit there for a few seconds // since they're hiding on the real bullets setTimeout("startanimate()", 2000); }}function dot(i) { this.X = Xpos; this.Y = Ypos; this.dx = 0; this.dy = 0; if (isNetscape) { this.obj = eval("document.dot" + i); } else { this.obj = eval("dot" + i + ".style"); }}function startanimate() { setInterval("animate()", 20);}// This is to line up the bullets with actual LI tags on the page// Had to add -DOTSIZE to X and 2*DOTSIZE to Y for IE 5, not sure why// Still doesn't work greatfunction setInitPositions(dots){ // initialize dot positions to be on top // of the bullets in the <ul> var startloc = document.all.tags("LI"); var i = 0; for (i = 0; i < startloc.length && i < (nDots - 1); i++) { dots[i+1].X = startloc[i].offsetLeft startloc[i].offsetParent.offsetLeft - DOTSIZE; dots[i+1].Y = startloc[i].offsetTop + startloc[i].offsetParent.offsetTop + 2*DOTSIZE; } // put 0th dot above 1st (it is hidden) dots[0].X = dots[1].X; dots[0].Y = dots[1].Y - SEGLEN;}// just save mouse position for animate() to usefunction MoveHandler(e){ Xpos = e.pageX; Ypos = e.pageY; return true;}// just save mouse position for animate() to usefunction MoveHandlerIE() { Xpos = window.event.x + document.body.scrollLeft; Ypos = window.event.y + document.body.scrollTop; }if (isNetscape) { document.captureEvents(Event.MOUSEMOVE); document.onMouseMove = MoveHandler;} else { document.onmousemove = MoveHandlerIE;}function vec(X, Y){ this.X = X; this.Y = Y;}// adds force in X and Y to spring for dot[i] on dot[j]function springForce(i, j, spring){ var dx = (dots[i].X - dots[j].X); var dy = (dots[i].Y - dots[j].Y); var len = Math.sqrt(dx*dx + dy*dy); if (len > SEGLEN) { var springF = SPRINGK * (len - SEGLEN); spring.X += (dx / len) * springF; spring.Y += (dy / len) * springF; }}function animate() { // dots[0] follows the mouse, // though no dot is drawn there var start = 0; if (followmouse) { dots[0].X = Xpos; dots[0].Y = Ypos; start = 1; } for (i = start ; i < nDots; i++ ) { var spring = new vec(0, 0); if (i > 0) { springForce(i-1, i, spring); } if (i < (nDots - 1)) { springForce(i+1, i, spring); } // air resisitance/friction var resist = new vec(-dots[i].dx * RESISTANCE, -dots[i].dy * RESISTANCE); // compute new accel, including gravity var accel = new vec((spring.X + resist.X)/ MASS, (spring.Y + resist.Y)/ MASS + GRAVITY); // compute new velocity dots[i].dx += (DELTAT * accel.X); dots[i].dy += (DELTAT * accel.Y); // stop dead so it doesn't jitter when nearly still if (Math.abs(dots[i].dx) < STOPVEL && Math.abs(dots[i].dy) < STOPVEL && Math.abs(accel.X) < STOPACC && Math.abs(accel.Y) < STOPACC) { dots[i].dx = 0; dots[i].dy = 0; } // move to new position dots[i].X += dots[i].dx; dots[i].Y += dots[i].dy; // get size of window var height, width; if (isNetscape) { height = window.innerHeight + document.scrollTop; width = window.innerWidth + document.scrollLeft; } else { height = document.body.clientHeight + document.body.scrollTop; width = document.body.clientWidth + document.body.scrollLeft; } // bounce of 3 walls (leave ceiling open) if (dots[i].Y >= height - DOTSIZE - 1) {?? 快捷鍵說明
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