function getElementsByClassName(ele) {
if (document.getElementsByClassName == undefined) {
	document.getElementsByClassName = function(className)
	{
		var hasClassName = new RegExp("(?:^|\\s)" + className + "(?:$|\\s)");
		var allElements = document.getElementsByTagName("*");
		var results = [];

		var element;
		for (var i = 0; (element = allElements[i]) != null; i++) {
			var elementClass = element.className;
			if (elementClass && elementClass.indexOf(className) != -1 && hasClassName.test(elementClass))
				results.push(element);
		}

		return results;
	}
}
}

function fs(para){
	var ele = document.getElementsByTagName("body");
	var ele2 = document.getElementById("dropList");
	switch (para){
	  case "font1":
		var fontsize = 12;
		ele[0].style.fontSize = fontsize + "px";
		ele2.style.fontSize = fontsize + "px";
		break;
	  case "font2":
		var fontsize = 15;
		ele[0].style.fontSize = fontsize + "px";
		ele2.style.fontSize = fontsize + "px";
		break;
	  case "font3":
		var fontsize = 20;
		ele[0].style.fontSize = fontsize + "px";
		ele2.style.fontSize = fontsize + "px";
		ele2.style.lineHeight = "30px";
		break;
	}
}