function random_imglink1(){
var myimages=new Array()
//specify random images below. You can have as many as you wish
myimages[1]="images/main01_a.jpg"
myimages[2]="images/main01_b.jpg"
myimages[3]="images/main01_a.jpg"
myimages[4]="images/main01_b.jpg"
var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=1
document.write('<img src="'+myimages[ry]+'" width="244" height="210" border=0>')
}

//----------------------------------------------------------------

function random_imglink2(){
var myimages=new Array()
//specify random images below. You can have as many as you wish
myimages[1]="images/main02_a.jpg"
myimages[2]="images/main02_b.jpg"
myimages[3]="images/main02_a.jpg"
myimages[4]="images/main02_b.jpg"
var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=1
document.write('<img src="'+myimages[ry]+'" width="244" height="210" border=0>')
}

//-------------------------------------------------------------
function random_imglink3(){
var myimages=new Array()
//specify random images below. You can have as many as you wish
myimages[1]="images/main03_a.jpg"
myimages[2]="images/main03_b.jpg"
myimages[3]="images/main03_a.jpg"
myimages[4]="images/main03_b.jpg"

var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=2
document.write('<img src="'+myimages[ry]+'" width="244" height="210" border=0>')
}

//--------------------------------------------------------------
function random_imglink4(){
var myimages=new Array()
//specify random images below. You can have as many as you wish
myimages[1]="images/main04_a.jpg"
myimages[2]="images/main04_b.jpg"
myimages[3]="images/main04_c.jpg"
myimages[4]="images/main04_a.jpg"
myimages[5]="images/main04_b.jpg"
myimages[6]="images/main04_c.jpg"

var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=1
document.write('<img src="'+myimages[ry]+'" width="244" height="210" border=0>')
}