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首页 / 脚本样式 / JavaScript / JS基于VML技术实现的五角星礼花效果代码

本文实例讲述了JS基于VML技术实现的五角星礼花效果代码。分享给大家供大家参考,具体如下:
这里演示的五角星礼花,基于HTML+js+VML技术共同编写实现,打开页面即可看到礼花绽放效果,五角星符号可以换成其它的符号,本效果可轻松修改成烟花升空爆炸特效,不过你要事先制作一个烟花的GIF小图,然后替换掉五角星。
运行效果截图如下:

在线演示地址如下:
http://demo.jb51.net/js/2015/js-vml-wjx-style-demo/
具体代码如下:
<HTML><HEAD><TITLE>五角星礼花</TITLE><META http-equiv=Content-Type content="text/html; charset=gb2312"></HEAD><BODY bgColor=#fef4d9><CENTER><TABLE borderColor=#00FF00 border=5 borderlight="green"> <TBODY> <TR> <TD align=middle><!--[if IE ]> <STYLE type=text/css>BODY {OVERFLOW: hidden}v:* {BEHAVIOR: url(#default#VML)}</STYLE><![endif]--><!--[if IE ]><SCRIPT language=JavaScript>colors = new Array();colors[0] = new Array("yellow", "lime");colors[1] = new Array("silver", "green")colors[2] = new Array("silver", "blue");colors[3] = new Array("silver", "purple");colors[4] = new Array("purple", "white");colors[5] = new Array("blue", "silver");colors[6] = new Array("red", "fuchsia");colors[7] = new Array("yellow", "red");// Define the maximum number of fire arrowsmaximum = 1000;vmlobj="";for(i = 0; i < 12; i++){vmlobj += "<div id="ster"+i+"" style="position:absolute; left:-50px; top-50px; visibility:hidden; z-index:50;">"; vmlobj += "<v:shape style="width:15px; height:15px;" fillcolor="yellow" coordorigin="0,0" coordsize="200 200">"; vmlobj += "<v:path v="m 8,65 l 72,65, 92,11, 112,65, 174,65, 122,100, 142,155,92,121, 42,155, 60,100 x e"/>"; vmlobj += "<v:stroke on="false" /></v:shape></div>"; }document.write(vmlobj); vmlobj = null;aantal = 0;function begin(){try { if(aantal == maximum){ return;} kleurschema = Math.floor(Math.random() * colors.length); posLinks = Math.floor(Math.random() * (document.body.clientWidth - 180)); posLinks = (posLinks < 170)? 170: posLinks; posBoven = Math.floor(Math.random() * (document.body.clientHeight - 180)); posBoven = (posBoven < 170)? 170: posBoven; straal = 0; uiteen = true; teller = 1; flikkereffect = false; for(var i = 0; i < 12; i++){ document.getElementsByTagName("shape")[i].setAttribute("fillcolor", colors[kleurschema][0]); document.getElementById("ster"+i).style.visibility = "hidden"; // 5.0 fix document.getElementById("ster"+i).style.left = posLinks; document.getElementById("ster"+i).style.top = posBoven; } document.getElementById("ster0").style.top = (document.body.clientHeight - 20);document.getElementById("ster0").style.visibility = "visible"; omhoog();} catch(e){}}function omhoog(){try { positie = parseInt(document.getElementById("ster0").style.top); if(positie > posBoven){ document.getElementById("ster0").style.top = (positie - 25);setTimeout("omhoog()", 50); } else {for(i = 1; i < 12; i++){document.getElementById("ster"+i).style.top = positie;document.getElementById("ster"+i).style.visibility = "visible";}uiteenspatten(); }} catch(e){}}function uiteenspatten(){try { if(straal > 120 && straal % 10 == 0){flikkereffect = true; teller = (teller == colors[kleurschema].length)? 0: (teller+1); } for(var i = 0; i < 12; i++){ var hoek = i * 30;var piHoek = Math.PI - Math.PI / 180 * hoek; var links = posLinks + Math.round(straal * Math.sin(piHoek));var boven = positie + Math.round(straal * Math.cos(piHoek)); document.getElementById("ster"+i).style.left = links; document.getElementById("ster"+i).style.top = boven; if(flikkereffect){ document.getElementsByTagName("shape")[i].setAttribute("fillcolor", colors[kleurschema][teller]); } } if(straal < 160 && uiteen){ straal += (straal < 120)? 10: 5; setTimeout("uiteenspatten()", 50); } else if(straal > 120){ uiteen = false; straal -= 5; setTimeout("uiteenspatten()", 50); } else if(straal <= 120){ for(var i = 0; i < 12; i++){ document.getElementById("ster"+i).style.visibility = "hidden"; } aantal++; setTimeout("begin()", 500); }} catch(e) {}}window.onload=begin;</SCRIPT><![endif]--></TD></TR></TBODY></TABLE></CENTER></BODY></HTML>
希望本文所述对大家JavaScript程序设计有所帮助。