function changeStyle(element_id, css_style) {
	var myvar;
	document.browserClass = parseInt(document.version);
	if (document.browserClass > 4) {
		if (document.layers) {
			myvar = 'window.document.layers["' + element_id + '"].document.className="' + css_style + '"';
		} else if (document.getElementById(element_id)) {
			myvar = 'document.getElementById("' + element_id + '").className="' + css_style + '"';
		}
	}
	eval(myvar);
}

function show(element_id)
{
	document.getElementById(element_id).style.display = 'block';
}
function hide(element_id)
{
	document.getElementById(element_id).style.display = 'none';
}