numQuotes=3;

begin = "<img src='side/"

end = ".jpg'>"

quoteArray = new Array(numQuotes);
quoteArray[1]="pic1"
quoteArray[2]="pic2"
quoteArray[3]="pic3"

quoteShowing=-1;

prevQuoteShowing = quoteShowing;
while(quoteShowing == prevQuoteShowing) 
quoteShowing = Math.ceil(Math.random() * numQuotes);
document.write(begin + quoteArray[quoteShowing] + end);