var path_to_thumbf='6/'; 
var num_of_thumbf=10;
var code_numf=num_of_thumbf-1;
thumbsf = new Array(code_numf);
<!-- Script writed by Doctor, 2003, for questions knock ICQ 171114296 :o)) -->
function genf(n){return (Math.round(Math.random()*n)+1);}
function check_numf(num){
for (j=0;j<=code_numf;j++){if (thumbsf[j]==num) return false};
return true;}

ex=genf(code_numf);
for (k=0;k<=code_numf;k++){
if (check_numf(ex)) {thumbsf[k]=ex;}
	else {
		while (check_numf(ex)==false) {ex=genf(num_of_thumbf-1)};
		thumbsf[k]=ex;
		}
}
var tf=0;
function thumb_viewf(){
document.writeln('<IMG SRC="'+path_to_thumbf+thumbsf[tf]+'.jpg">');
t++;
}