About javascript under pulls the frame, realized has double-clicked the automatic fluctuation the function

Packet : 87360994javascriptexample.rar filelist
双下拉列表框--数据调换.files\shanqu.jpg
双下拉列表框--数据调换.files\tianjia.jpg
双下拉列表框--数据调换.files
1、双下拉列表框--数据调换.htm
双下拉列表.htm

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