function sum(num){
	var i=0, nSum = 0, sSum = '', sDigit = '', sNum = '', nLen = 0;
	nSum = parseInt(num,10);
	while (nSum > 9){
		sSum = nSum.toString(10);
		nLen = sSum.length;
		nSum = 0;
		for(i=0; i<nLen; i++){
			sDigit = sSum.substring(i,i+1);
			if (sDigit != ".") {
				nSum = nSum + parseInt(sDigit, 10);
			}
		}
	}
	return nSum;
}
function rnd(min,max,size){
	var rNum = Math.random() * Math.pow(10,size);
	var sNum = '', nSum = 0;			
	if (rNum > max){rNum = (max * rNum) + 1};
	nSum = sum((rNum.toString(10)).substring(0,size));
	return nSum.toString(10);
}
function getImage(){
	var prev = document.form1.prev.value;
	var i = rnd(0,10,2);
	while ( parseInt(prev, 10) == parseInt(i, 10)){i = rnd(0,10,2);}
	document.form1.prev.value = i;
	return i;
}