網頁錯誤詳細資訊
訊息: 物件不支援此屬性或方法

document.getElementsByClassName('element_name')

//create method getElementsByClassName for document
	if(!document.getElementsByClassName){
		document.getElementsByClassName = function(className, element){
			var children = (element || document).getElementsByTagName('*');
			var elements = new Array();
			for (var i=0; i<children.length; i++){
				var child = children[i];
				var classNames = child.className.split(' ');
				for (var j=0; j<classNames.length; j++){
					if (classNames[j] == className){ 
						elements.push(child);
						break;
					}
				}
			} 
			return elements;
		};
	}