How can I make a website image show at a spectific time?

How can I make my website banner change from a daytime picture at daytime to a night picture at night,using HTML or javascript?I have had a code like that before but I don't remember.How can I make a website image show at a spectific time?Banner Rotators:



http://script.wareseeker.com/free-aurora鈥?/a>



Ron

client time

transfer file