状态栏慢慢计算Pi值
下面为效果显示
脚本说明: 把如下代码加入<body>区域中： <script> <!-- function pi(name){ this.init = init; this.compNext = p_compNext; this.printPi = p_printPi; this.computePi = p_computePi; this.runs = new Number(); this.data = new Number(); this.sign = new Number(); this.name = name; //this.init(); } function init(){ this.runs = -1; this.data = 0; this.sign = -1; } function p_computePi(delay){ //eval(this.name+".compNext();"); this.compNext(); if (this.runs %100 == 0) this.printPi(); //eval(this.name+".printPi();"); setTimeout(this.name + ".computePi("+delay+")",delay); } function p_printPi(){ //document.pi.pivalue.value = this.data * 4; window.status = "[" + this.runs + "] > " + this.data * 4; //document.pi.runs.value = this.runs; } function p_compNext(){ this.sign = parseInt(this.sign) * -1; this.runs = parseInt(this.runs) + 1; this.data += Math.pow((parseInt(this.runs) * 2 + 1),-1) * this.sign; } myPi = new pi("myPi"); myPi.init(); myPi.computePi(1); //--> </script>