《JavaScript网页开发体验式学习教程》的源代码

									/*var msg = "全局变量";
					function square(x,y)
					{
						var sum;
						sum = x*x + y*y;
						return sum;
					}
					function show()
					{
						var msg = "局部变量";
						alert(msg);
					}
				
				
					var sum;
					alert("sum=" + sum);//此时sum的值为undefined
					sum=square(2,3);
					alert("sum=" + sum);
					//上面的两条语句可以改写成下面的被注释的语句
					//alert("sum=" + square(2,3));
					show();*/
				
					var msg = "全局变量";
					function show()
					{
						var msg;
						msg = "局部变量";
					}
					show();
					alert(msg);
				
				
				
									/*function testParams()
					{
						var params = "";
						for(var i=0; i						{
							params += " " + arguments[i];
						}
						alert(params);
					}
					testParams("abc",123);
					testParams(123,456,"abc");*/
					/*var square = new Function("x","y","var sum;sum=x*x + y*y;return sum;");*/
					function square(x,y)
					{
						var sum;
						sum=x*x + y*y;
						return sum;
					}
					alert(square(2,3));
				
				
				 //var urlStr = encodeURI("http://www.it315.org/index.html?country=中国&name=z x");
				
				  var urlStr = decodeURI("http://www.it315.org/index.html?country=%E4%B8%AD%E5%9B%BD&name=z%20x");
				
				  alert(("123abc" + 1) + "\n" + (parseInt("123abc",10) +1));