为array赋予属性
if (!Array.prototype.indexOf) { Array.prototype.indexOf = function (elt /*, from*/) { var len = this.length >>> 0; var from = Number(arguments[1]) || 0; from = (from < 0) ? Math.ceil(from) : Math.floor(from); if (from < 0) from += len; for (; from < len; from++) { if (from in this && this[from] === elt) return from; } return -1; }; }
调用
var arrList = []; if (arrList.indexOf(strID)== -1) { //做爱做的事 }
时间: 2024-11-01 13:49:16