function changeStyleHide(s) {
	var theRules = new Array();
	if (document.styleSheets[0].cssRules) {
		document.styleSheets[0].insertRule('.' + s + ' {' + 'display: none' + '}',document.styleSheets[0].cssRules.length);
	} else {
		if (document.styleSheets[0].rules) {
			document.styleSheets[0].addRule('.' + s, 'display: none');
		}
	}
}

function changeStyleShow(s) {
	var theRules = new Array();
	if (document.styleSheets[0].cssRules) {
		document.styleSheets[0].insertRule('.' + s + ' {' + 'display: block' + '}',document.styleSheets[0].cssRules.length);
	} else {
		if (document.styleSheets[0].rules) {
			document.styleSheets[0].addRule('.' + s, 'display: block');
		}
	}
}