function showBG() {
var bg01="../img/bg/001.jpg"
var bg02="../img/bg/002.jpg"
var bg03="../img/bg/003.jpg"
var bg04="../img/bg/004.jpg"
var bg05="../img/bg/005.jpg"
var bg06="../img/bg/006.jpg"
var bg07="../img/bg/007.jpg"
var bg08="../img/bg/008.jpg"
var bg09="../img/bg/009.jpg"
var bg10="../img/bg/010.jpg"
var bg11="../img/bg/011.jpg"
var bg12="../img/bg/012.jpg"
var bg13="../img/bg/013.jpg"
var bg14="../img/bg/014.jpg"
var bg15="../img/bg/015.jpg"
var bg16="../img/bg/016.jpg"
var bg17="../img/bg/017.jpg"
var bg18="../img/bg/018.jpg"
var bg19="../img/bg/019.jpg"
var bg20="../img/bg/020.jpg"
var bg21="../img/bg/021.jpg"
var bg22="../img/bg/022.jpg"
var bg23="../img/bg/023.jpg"
var bg24="../img/bg/024.jpg"
var bg25="../img/bg/025.jpg"
var bg26="../img/bg/026.jpg"
var bg27="../img/bg/027.jpg"
var bg28="../img/bg/028.jpg"
var bg29="../img/bg/029.jpg"
var bg30="../img/bg/030.jpg"
var bg31="../img/bg/031.jpg"
var bg32="../img/bg/032.jpg"
var bg33="../img/bg/033.jpg"
var bg34="../img/bg/034.jpg"
var bg35="../img/bg/035.jpg"
var bg36="../img/bg/036.jpg"
var bg37="../img/bg/037.jpg"
var bg38="../img/bg/038.jpg"
var bg39="../img/bg/039.jpg"
var bg40="../img/bg/040.jpg"
var bg41="../img/bg/041.jpg"
var bg42="../img/bg/042.jpg"
var bg43="../img/bg/043.jpg"
var bg44="../img/bg/044.jpg"
var bg45="../img/bg/045.jpg"
var bg46="../img/bg/046.jpg"
var bg47="../img/bg/047.jpg"
var bg48="../img/bg/048.jpg"
var bg49="../img/bg/049.jpg"
var bg50="../img/bg/050.jpg"
var bg51="../img/bg/051.jpg"
var bg52="../img/bg/052.jpg"
var bg53="../img/bg/053.jpg"
var bg54="../img/bg/054.jpg"
var bg55="../img/bg/055.jpg"
var bg56="../img/bg/056.jpg"
var bg57="../img/bg/057.jpg"
var bg58="../img/bg/058.jpg"
var bg59="../img/bg/059.jpg"
var bg60="../img/bg/060.jpg"
var bg61="../img/bg/061.jpg"
var bg62="../img/bg/062.jpg"
var bg63="../img/bg/063.jpg"
var bg64="../img/bg/064.jpg"



var x = Math.round(40*Math.random())
if (x == 1) bgvar=bg01
else if (x == 2) bgvar=bg02
else if (x == 3) bgvar=bg03
else if (x == 4) bgvar=bg04
else if (x == 5) bgvar=bg05
else if (x == 6) bgvar=bg06
else if (x == 7) bgvar=bg07
else if (x == 8) bgvar=bg08
else if (x == 9) bgvar=bg09
else if (x == 10) bgvar=bg10
else if (x == 11) bgvar=bg11
else if (x == 12) bgvar=bg12
else if (x == 13) bgvar=bg13
else if (x == 14) bgvar=bg14
else if (x == 15) bgvar=bg15
else if (x == 16) bgvar=bg16
else if (x == 17) bgvar=bg17
else if (x == 18) bgvar=bg18
else if (x == 19) bgvar=bg19
else if (x == 20) bgvar=bg20
else if (x == 21) bgvar=bg21
else if (x == 22) bgvar=bg22
else if (x == 23) bgvar=bg23
else if (x == 24) bgvar=bg24
else if (x == 25) bgvar=bg25
else if (x == 26) bgvar=bg26
else if (x == 27) bgvar=bg27
else if (x == 28) bgvar=bg28
else if (x == 29) bgvar=bg29
else if (x == 30) bgvar=bg30
else if (x == 31) bgvar=bg31
else if (x == 32) bgvar=bg32
else if (x == 33) bgvar=bg33
else if (x == 34) bgvar=bg34
else if (x == 35) bgvar=bg35
else if (x == 36) bgvar=bg36
else if (x == 37) bgvar=bg37
else if (x == 38) bgvar=bg38
else if (x == 39) bgvar=bg39
else if (x == 40) bgvar=bg40
else if (x == 41) bgvar=bg41
else if (x == 42) bgvar=bg42
else if (x == 43) bgvar=bg43
else if (x == 44) bgvar=bg44
else if (x == 45) bgvar=bg45
else if (x == 46) bgvar=bg46
else if (x == 47) bgvar=bg47
else if (x == 48) bgvar=bg48
else if (x == 49) bgvar=bg49
else if (x == 50) bgvar=bg50
else if (x == 51) bgvar=bg51
else if (x == 52) bgvar=bg52
else if (x == 53) bgvar=bg53
else if (x == 54) bgvar=bg54
else if (x == 55) bgvar=bg55
else if (x == 56) bgvar=bg56
else if (x == 57) bgvar=bg57
else if (x == 58) bgvar=bg58
else if (x == 59) bgvar=bg59
else if (x == 60) bgvar=bg60
else if (x == 61) bgvar=bg61
else if (x == 62) bgvar=bg62
else if (x == 63) bgvar=bg63
else bgvar=bg64

document.write("<img src="+bgvar+" width=600 height=120>")
}