JavaScript - Cambiar imagen al refrescar la página

<SCRIPT>

var img1= "imagen1.jpg"

var img2= "imagen2.jpg"

var img3= "imagen3.jpg"

var img4= "imagen4.jpg"

var img5= "imagen5.jpg"

var img6= "imagen6.jpg"

var img7= "imagen7.jpg"

var img8= "imagen8.jpg"

var img9= "imagen9.jpg"

var img10= "imagen10.jpg"

var randomize = Math.round(Math.random()*9)+1

if (randomize == 1){

newimg = img1

}else if (randomize == 2){

newimg = img2

}else if (randomize ==3){

newimg = img3

}else if (randomize ==4){

newimg = img4

}else if (randomize ==5){

newimg = img5

}else if (randomize ==6){

newimg = img6

}else if (randomize ==7){

newimg = img7

}else if (randomize ==8){

newimg = img8

}else if (randomize ==9){

newimg = img9

}else{

newimg = img10

}

document.write('<IMG SRC="'+newimg+'"width="50" height="50" border="0" align="absmiddle">')

</SCRIPT>

<SCRIPT>

{gfx=new Array()

// solamente kambia el nombre de la imagen xlas tuyas *DTO*

gfx[0]="image1.gif"

gfx[1]="image2.gif"

gfx[2]="image3.gif"

today2=new Date()

len=3

today=today2.getTime()/10

rnd=today % len

document.writeln('<IMG SRC="'+gfx[rnd]+'">')}

//-->

</SCRIPT>

<p align="center"><font face="arial" size="-2">This free script provided by</font><br>

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Abstraction</a></font></p>