生成500个0-1000的随机数&&数组查找

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    var obody = document.getElementsByTagName('body')[0];

    for (var i = 0; i < 550; i++)

    {

        obody.innerHTML += Math.round(Math.random()*1000)+ ' ';

    }

}

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window.onload = function ()

{

    var arr = [1,2,3,4,5,6,7,8,9];

    var num = 3;

    alert(arr.join('').indexOf(num));

};

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巴特西

生成500个0-1000的随机数&&数组查找—小练习

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