学院首页>网页制作>Javascript>跟随鼠标的旋转星星

跟随鼠标的旋转星星

作者：未知来源：- 添加时间：2006-5-21 9:21:23

在<BODY>区加入以下代码:

<script language=JavaScript> if (document.all){ with (document){ write('<div id="starsDiv" style="position:absolute;top:0px;left:0px">') write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>') write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>') write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>') write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>') write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>') write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>') write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>') write('<div style="position:relative;width:2px;height:2px;background:#6699CC;font-size:2px;visibility:visible"></div>') write('<div style="position:relative;width:2px;height:2px;background:#6699CC;font-size:2px;visibility:visible"></div>') write('<div style="position:relative;width:2px;height:2px;background:#6699CC;font-size:2px;visibility:visible"></div>') write('<div style="position:relative;width:2px;height:2px;background:#6699CC;font-size:2px;visibility:visible"></div>') write('<div style="position:relative;width:2px;height:2px;background:#6699CC;font-size:2px;visibility:visible"></div>') write('<div style="position:relative;width:2px;height:2px;background:#6699CC;font-size:2px;visibility:visible"></div>') write('<div style="position:relative;width:3px;height:3px;background:#6699CC;font-size:3px;visibility:visible"></div>') write('</div>') } } if (document.layers) {window.captureEvents(Event.MOUSEMOVE);} var yBase = 200; var xBase = 200; var step = 1; var currStep = 0; var Xpos = 1; var Ypos = 1; if (document.all) { function MoveHandler(){ Xpos = document.body.scrollLeft+event.x; Ypos = document.body.scrollTop+event.y; } document.onmousemove = MoveHandler; } else if (document.layers) { function xMoveHandler(evnt){ Xpos = evnt.pageX; Ypos = evnt.pageY; } window.onMouseMove = xMoveHandler; } function animateLogo() { if (document.all) { yBase = window.document.body.offsetHeight/6; xBase = window.document.body.offsetWidth/6; } else if (document.layers) { yBase = window.innerHeight/8; xBase = window.innerWidth/8; } if (document.all) { for ( i = 0 ; i < starsDiv.all.length ; i++ ) { starsDiv.all[i].style.top = Ypos + yBase*Math.sin((currStep + i*4)/12)*Math.cos(400+currStep/200); starsDiv.all[i].style.left = Xpos + xBase*Math.sin((currStep + i*3)/10)*Math.sin(currStep/200); } } else if (document.layers) { for ( j = 0 ; j < 14 ; j++ ) //number of NS layers! { var templayer="a"+j document.layers[templayer].top = Ypos + yBase*Math.sin((currStep + j*4)/12)*Math.cos(400+currStep/200); document.layers[templayer].left = Xpos + xBase*Math.sin((currStep + j*3)/10)*Math.sin(currStep/200); } } currStep+= step; setTimeout("animateLogo()", 10); } animateLogo(); </script>

其中，每一行write('<div style="position:relative;width:1px;height:1px;background:#6699CC;font-size:1px;visibility:visible"></div>')就代表一只小星星；其间的font-size:1px代表小星星的大小，background:#6699CC代表小星星的颜色；而前面的width:1px;height:1px则分别代表小星星的宽和高。你可以自已试着改变它们的具体属性和星星的数量。

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