js （1）

<html>
<head>
</head>
<body>
//script type="text/javascript" src="/js/Index.js" 
<script type="text/javascript">
var x;
x=5;
document.write(x+"<br>");//
y="5";
z=5;
document.write(y+y+"<br>");
document.write(z+z+"<br>");

//switch语句 是date而不是data
var d=new Date()
theDay=d.getDay()
switch(theDay)
{
  case 5:
  document.write("Finally Friday")
  break
  case 6:
  document.write("Super Saturday")
  break
  case 0:
  document.write("Sleepy Sunday")
  break
  default:
  document.write("<br>I'm looking forward to this weekend!<br>")
}

//确认框
function show_confirm()
{
var r=confirm("Press a button!");
if(r=true)
 alert("You press OK!");
 else
 alert("You press Cancel!");
}

//提示框
function  show_prompt()
{
var name=prompt("请输入您的名字","Bill Gates");
if(name!=null&&name!="")
document.write("Hello!　"+name+" how about today？");
}
</script>
<input type="button" onclick="show_confirm()" value="Show a confirm box"/>
<p>
实际的脚本位于名为“xxx.js”的外部脚本中。
</p>


//提示框
<input type="button" onclick="show_prompt()" value="显示提示框" />
</body>
</html>