flag = new Array()
comment = new Array("comment0","comment1","comment2","comment3","comment4")

function ShowHide(n) {
	v = (flag[n]) ? "hidden" : "visible"
	if (document.all) document.all(comment[n]).style.visibility = v
	else if (document.layers) document.layers[comment[n]].visibility = v
	else if ( document.getElementById )
		document.getElementById(comment[n]).style.visibility = v
	flag[n] = !flag[n]
}