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        function arrayTest() {
            //ʹÓÃnew Array()
            var array1 = new Array();
            //ʹÓÃ[]²Ù×÷·û
            var array2 = [];
            //´´½¨µÄͬʱ¶¨ÒåÊý×éÖеÄÔªËØ
            //ʹÓÃnew Array()·½Ê½
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            var array4 = [1, 2, 3];
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            alert(array3[1]);
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- event
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