@@ -16,15 +16,20 @@
  <a href="#NodeJs">Node.js</a>&nbsp;&nbsp;
  <a href="#html5nodejs"> html5</a>&nbsp;&nbsp;
  <br/>
+ <h3 name="javascriptBase">Javascript based</h3>
+1.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/reference">对象JavaScript 引用</a> <br />
+2.JavaScript this <br />
+3.JavaScript 闭包<br />
+4.JavaScript 事件</a> <br />
+5.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/crossDomain.js">javascript 跨域</a> <br /> 
+
+
 <h3 name="OjectOriented">Oject-Oriented</h3>
 1.<a href="https://github.com/wchaowu/javascript-code/tree/master/object-oriented/Expressive-JavaScript">JavaScript Expressive </a> <br />
 2.<a href="https://github.com/wchaowu/javascript-code/tree/master/object-oriented/Interfaces"> Interfaces </a> <br />
 3.<a href="https://github.com/wchaowu/javascript-code/tree/master/object-oriented/Introduction">Introduction</a> <br />
 4.<a href="https://github.com/wchaowu/javascript-code/tree/master/object-oriented/Inheritance"> Inheritance </a> <br />
-<h3 name="javascriptBase">Javascript based</h3>
-1.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/this">JavaScript this </a> <br />
-2.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/closure">JavaScript 闭包</a> <br />
-3.<a href="https://github.com/wchaowu/javascript-code/tree/master/javascript-based/event">JavaScript 事件</a> <br />
+
 <h3>Jquery</h3>
 为了更加了解Jquery实现机制可以先了解
  <a href="https://github.com/madrobby/zepto#readme">zepto</a>
 
@@ -0,0 +1,84 @@
+/*正常的情况*/
+var a = 5;
+var b = a;
+
+b += 3;
+
+alert(b);  //8
+alert(a);  //5
+
+
+
+//对象和函数都是引用的关系
+var a = [1,2,3];
+var b = a;
+
+b.push(4);
+
+alert(b); //1,2,3,4
+alert(a); //1,2,3,4*/
+
+//数组重新写
+var a = [1,2,3];
+var b = a;
+b = [1,2,3,4];
+
+alert(b);  //1,2,3,4
+alert(a);  //1,2,3
+
+/*对象赋值*/
+var obj = {
+	a : 10
+};
+var obj2 = obj;
+
+obj2.a = 20;
+
+alert(obj.a);  //20*/
+
+//赋值解决方案
+var obj = {
+	a : 10
+};
+
+function copy(obj){  //浅拷贝
+	
+	var newObj = {};
+	
+	for(var attr in obj){
+		newObj[attr] = obj[attr];
+	}
+	
+	return newObj;
+	
+}
+
+var obj2 = copy(obj);
+
+obj2.a = 20;
+
+alert(obj.a);  //10
+
+//解决方案二
+function deepCopy(obj){  //深拷贝
+
+	if(typeof obj != 'object'){
+		console.trace();
+		return obj;
+	}
+	
+	var newObj = {};
+	
+	for(var attr in obj){
+		newObj[attr] = deepCopy(obj[attr]);
+	}
+	
+	return newObj;
+	
+}
+
+var obj2 = deepCopy(obj);
+
+obj2.a.b = 20;
+
+alert(obj.a.b);  //10