<script language="javascript">
var Quotes = new makeArray (4) ;
Quotes = "1.jpg" ;
Quotes = "2.jpg" ;
Quotes = "3.jpg" ;
function makeArray (n) {
this.length=n ;
for (var t=0;t<n;t++) this = '' ;
}
var quote=Math.round(Math.random(1)*4);
document.write("<img src="+Quotes+" align=middle>");
</script>

תודה מראש.

var quote=Math.round(Math.random(1)*3);