摘要:
js 判断是否为空的代码如下: // var a = ""; // var a = " "; // var a = null; // var a = undefined; // var a = []; // var a = {}; // var a = NaN; if(a undefined) { 阅读全文
摘要:
<body OnLoad="swapPic()"> <script language="javascript" type="text/javascript"> var ranl = 0; var useRand = 0; images = new Array; images[1] = new Ima 阅读全文