count = 0;

function disptopimg()
{
	var imgAry = new Array('0501-015','0504-005','0506-003','0222-020','0222-011','0213-015','0213-021','0212-071','0212-153','0221-003','0221-011','0221-019','0221-059','0221-072','0221-133','0221-154','0318-005','0318-010','0318-022');
	count++;
	count %= imgAry.length;
	document.topimg1.src = "img/top/" + imgAry[count] + ".jpg";
}