模拟太空飞行
看到效果了吧!
脚本说明: 第一步:把如下代码加入<body>区域中 <SCRIPT LANGUAGE="JavaScript"> <!-- Begin astropic = "5.jpg"; // location of YOUR astronaut image var xval = new Array(); // holds star coordinates var yval = new Array(); no = 100; // number of stars in the background speed = 200; // speed xp = 20 + 100 * Math.random(); yp = 20 + 100 * Math.random(); angle = 3.14 * Math.random(); // astronaut angle xinc = 3 * Math.sin(angle); yinc = 3; ie = (document.all)? 1 : 0; ns = (document.layers)? 1: 0; if (ie) { width = document.body.clientWidth; height = document.body.clientHeight; for (var i = 0; i <= no; i++) { document.write("<div id=\"div" + i+ "\" style=\"color:white;"); document.write("position:absolute;left:100;\">.</div>"); } document.write("<div id=\"diva\" style=\"position:absolute;\">"); document.write("<img src=" + astropic + " border=\"0\" width=\"65\" height=\"95\"></div>"); for (i = 0; i <= no; i++) { xval[i] = width * Math.random(); yval[i] = height * Math.random(); document.all["div" + i].style.left = xval[i]; document.all["div" + i].style.top = yval[i]; } } if (ns) { width = self.innerWidth; height = self.innerHeight; for (var i = 0; i <= no; i++) { document.write("<layer id=\"div" + i+ "\" style=\"color:white;"); document.write("position:absolute;left:100;\">.</layer>"); } document.write("<layer id=\"diva\" style=\"position:absolute;\">"); document.write("<img src=" + astropic + " border=\"0\" width=\"65\" height=\"95\"></layer>"); for (i = 0; i <= no; i++) { xval[i] = width * Math.random(); yval[i] = height * Math.random(); document.layers["div" + i].left = xval[i]; document.layers["div" + i].top = yval[i]; } } function star() { for (i = 0; i <= no; i = i+4) { xval[i] +=5; if ((i%20) == 0) xval[i] += 10; if(xval[i] >= width) xval[i] = width * Math.random(); if (ie) document.all["div" + i].style.left = xval[i]; if (ns) document.layers["div" + i].left = xval[i]; } return true; } function goangle() { angle = 3.14 * Math.random(); xinc = 3 * Math.sin(angle); return true; } function space() { if (ie) { document.all["diva"].style.left = xp; document.all["diva"].style.top = yp; } if (ns) { document.layers["diva"].left = xp; document.layers["diva"].top = yp; } xp += xinc; yp +=yinc; star(); if ((xp >= (width - 50)) || (xp <= 10)) { goangle(); xinc = (-1) * xinc; } if ((yp >= (height - 50)) || (yp <= 10)) { goangle(); yinc = (-1) * yinc; } setTimeout('space()', speed); } // End --> </script> 第二步:把<body>区域中的内容改为: <BODY bgcolor="black" onLoad="space()">