function showBG() {
var bg01="picture/spring881.jpg"
var bg02="picture/spring882.jpg"
var bg03="picture/sardar.jpg"





var x = Math.round(4*Math.random())
if (x == 1) bgvar=bg01
else if (x == 2) bgvar=bg02
else bgvar=bg03

document.write("<img src="+bgvar+" width=425 height=110>")
}