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        function arrayTest() {
            //ʹÓÃnew Array()
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            var array2 = [];
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            var array3 = new Array(1, 2, 3);
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            var array4 = [1, 2, 3];
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            var array5 = new Array(1, new Array(2, 3), 4);
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<script language = "javascript">

var sum = 0;
var start = new Date;
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