function.html

《JavaScript网页开发体验式学习教程》的源代码

<!--script language="javascript">
	/*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);


</script-->
<!--script language="javascript">
	/*function testParams()
	{
		var params = "";
		for(var i=0; i<arguments.length; 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));
</script-->
<script>
 //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));
</script>