function randomNumber(limit){
  return Math.floor(Math.random()*limit);
}

initHoles = function()
{
	var rn = randomNumber(7)+1;
	if (document.all&&document.getElementById) {
	for(var i = 1; i < 8; i++){
			document.getElementById("h"+i).style.display = "none";
	}
	}
	document.getElementById("h"+rn).style.display = "block";
    document.getElementById(rn).src = 'images/wt-br'+rn+'.gif';
}

function showHole(hole)
{
	for(var i = 1; i < 8; i++){
		document.getElementById("h"+i).style.display = "none";
	}
	document.getElementById(hole).style.display = "block";
}

function rollonby(imgNm) {
	if (document.all&&document.getElementById) {
	for(var i = 1; i < 8; i++){
			document.getElementById(i).src = 'images/br'+i+'.gif';
	}
	}
    document.getElementById(imgNm).src = 'images/wt-br'+imgNm+'.gif';
  }