<!--
function eml(a, b, c, d){
	var str = '<a href="mailto:'+a+'@'+b+'.'+c+'?subject='+d+'" target="_blank">'+a+'@'+b+'.'+c+'</a>'
	document.write(str)
}
function eml2(a, b, c, d, e){
	var str = '<a href="mailto:'+a+'@'+b+'.'+c+'?subject='+d+'" target="_blank">'+e+'</a>'
	document.write(str)
}

function show_explanation(element_id){
    var element = document.getElementById(element_id);
	for (var i=0; i<element.childNodes.length; i++) {
		var node = element.childNodes[i];
	    if (node.id == 'explanation_content') {
		    node.className = 'shown';
		}
	    else if (node.id == 'link_hide') {
		    node.className = 'shown';
		}
	    else if (node.id == 'link_show') {
		    node.className = 'hidden';
		}
	}
}

function hide_explanation(element_id){
    var element = document.getElementById(element_id);
	for (var i=0; i<element.childNodes.length; i++) {
		var node = element.childNodes[i];
	    if (node.id == 'explanation_content') {
		    node.className = 'hidden';
		}
	    else if (node.id == 'link_hide') {
		    node.className = 'hidden';
		}
	    else if (node.id == 'link_show') {
		    node.className = 'shown';
		}
	}
}
//-->
