一閃一閃亮晶晶javascript
<script type="text/javascript"> var nn = Number(prompt('請輸入一個1-9的正整數!')); var n =nn; var num=n; var star="*"; // document.write(num01); for (var i = 0; i < n; i++) { for (var j = 0; j < num; j++) { document.write(star) } --num; document.write(n); document.write("<br />"); } n =nn; for (var i = 1; i < n; i++) { for (var j = 0; j < i+1; j++) { document.write(star) } document.write(n); document.write("<br />"); } </script>
window對 圖片自動切換 要求:使用延時器和定時器來製做。java
<script type="text/javascript"> var i=0; window.onload=function() { window.setInterval(Getimg,100); } function Getimg() { ++i var imgObj=document.getElementById("imgId"); imgObj.src="images/dd_scroll_"+i+".jpg"; if (i==6) { i=0; } } </script> </head> <body> <img id="imgId" src="" /> </body>
點出滿天小星星app
<script type="text/javascript"> function start2(e) { var x=e.clientX; // document.write(x); var y=e.clientY; // document.write(y); // 建立節點 var imgObj=document.createElement("img"); // 掛載節點 document.body.appendChild(imgObj); imgObj.src="1.png"; imgObj.width=getRandom(20,50); imgObj.style.position = "absolute"; imgObj.style.left = x-imgObj.width/2 + "px"; imgObj.style.top = y-imgObj.width/2 + "px"; // imgObj.style.left= } function getRandom(min,max) { var random=Math.random()*(max-min)+min; return random; } </script>