创建元素 SeaJS

elementCreate.js

/**
 * 创建元素
 */
 
define(function(require, exports) {
  exports.create = function(tagName, attr) {
		var element = null;
		if (typeof tagName === "string") {
			element = document.createElement(tagName);	
			
			if (typeof attr === "object") {
				var keyAttr, keyStyle;
				for (keyAttr in attr) {
					if (keyAttr === "styles" && typeof attr[keyAttr] === "object") {
						// 样式们
						for (keyStyle in attr[keyAttr]) {
							element.style[keyStyle]	= attr[keyAttr][keyStyle];
							
							if (keyStyle === "opacity" && window.innerWidth + "" == "undefined") {
								element.style.filter = "alpha(opacity="+ (attr[keyAttr][keyStyle] * 100) +")";
							}
						}
					} else {
						if (keyAttr === "class") {
							keyAttr = "className";
						}
						element[keyAttr] = attr[keyAttr];
					}
					
				}
			}
		}
		return element;
	};
});