function expandfirst() {
			document.getElementById(expandfirst.arguments[0]).style.display = "block";
			for (var i=1; i<expandfirst.arguments.length; i++) {
				document.getElementById(expandfirst.arguments[i]).style.display = "none";
			}
		}
function expandcollapse() {
	for (var i=0; i<expandcollapse.arguments.length; i++) {
		var element = document.getElementById(expandcollapse.arguments[i]);
		element.style.display = (element.style.display == "none") ? "block" : "none";
	}
}

function change_article_font_plus(){
	document.getElementById('page-title-left').style.fontSize="12px";	
	document.getElementById('post').style.fontSize="16px";
}

function change_article_font_minus(){
	document.getElementById('page-title-left').style.fontSize="10px";	
	document.getElementById('post').style.fontSize="12px";
}