JavaScript outputs the last updated time of a file in a specified format_javascript skills

This function is mainly obtained based on document.lastModified, and then simply processed.

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Note: lastMod.getYear( )<200?(lastMod.getYear() 1900, this code is written for compatibility with ff, if not written, the year 2006 will be displayed as 106.

The display effect is as follows:
Last update:2006-6-28 16:43:25