<!--
var NS4 = (document.layers);
var IE4 = (document.all);


var x = 0
var numoflayers=3

function changeit(x) {
	if (IE4) {
		for (y=0;y<=numoflayers;y++) {
			eval("explan" + y + ".style.visibility='hidden'")
		}
		
		
		eval("explan" + x + ".style.visibility='visible'")
	}
	if (NS4) {
		for (y=0;y<=numoflayers;y++) {
			eval("document.explan" + y + ".visibility='hidden'")
			if (x==y) {
			eval("document.explan" + x + ".visibility='visible'")}
		}}
	
	
}

//-->