varLength = 1
var entryContent = new Array(varLength)

entryContent[0] = " <div align=\"center\"><a href=\"http://www.homes.com/Content/ListingSearchResults.cfm?PropType=*&MinPrice=&MaxPrice=&Bedrooms=&Fullbaths=&ZipCode=21030\" target=\"_blank\"><img src=\"realestate.gif\" width=\"90\" height=\"90\" border=\"0\"></a></div>"

var randomNumber = Math.random()
randomNumber *= varLength
randomNumber = parseInt(randomNumber)
if(isNaN(randomNumber)) randomNumber = 0
else randomNumber %= varLength
selectedContent = entryContent[randomNumber]

document.write (selectedContent)