jsp；

来源：互联网发布：淘宝上花呗怎么开通编辑：程序博客网时间：2024/05/22 11:26

1.格式
<script type="text/javascript">
document.write("")；

alert("Hello,JavaScript!");

var greeting = "Welcome to the JS!";
document.write(greeting)；

var result1,result2;
result1 = (3>4)?"Y":"N";

   var today = new Date();
   var hour = today.getHours();
   document.write(today+"<br>");
   document.write(hour);

     function test()
   {
    document.write("a");
    document.write("b");
   }

</script>

2.从外部引入JavaScript
<script language="JavaScript" src="22222.js"></script>

3.数组

    <html>
<head>
  <title>
  JavaScript数组
  </title>
  <Script Language="JavaScript">
   var arr = new Array(3);
   arr[0] = 1;
   arr[1] = 2;
   arr[2] = 3;
   arr[3] = 4;
   arr["rrr"] = 4090;
  </Script>
</head>
<body>
<Script language="JavaScript">
  //document.write(arr["rrr"]);
  //document.write(arr.length);
  for(var o in arr) {
   //document.write(o);
   document.write(arr[o]);
  }
</Script>
</body>
</html>
4，判断表传的值是否非空

6.删除文件

<html>
<head>
  <title>
  函数
  </title>
<Script language="JavaScript">
function confirmit()
{
if(confirm("你确认删除此文件么？"))
{
  document.testa.submit();
}
}
</Script>
</head>
<body>
<form name="testa" action="ttt.jsp" method="post">
  <input type="button" value="删除文件" onclick="JavaScript:confirmit()" name="aaa">
</form>
</body>
</html>
7.鼠标移动

<form name="ttt">
  <input type="button" value="test" onMouseOver="window.status='haha';">
</form>
</body>
</html>
8.新开窗口
<html>
<head>
  <title>
  新开窗口
  </title>
</head>
<body onload="javascrip: open()">
<Script language="JavaScript">
//window.open("1.htm","newWin","toolbar=no,left=200,top=100,menubar=no,width=100,height=100,resizable=no");
//window.open("1.htm","newWin","toolbar=no,left=200,top=100,menubar=no,width=100,height=100,resizable=no");
//window.open("1.htm");
</Script>
<Script language="JavaScript">
   function open()
   {
       //alert('ok');
    window.open("1.htm","newWin","toolbar=no,left=200,top=100,menubar=no,width=100,height=100,resizable=no");
}
</Script>
</body>
</html>
9.在打开一个窗口另一个窗口也打开
<html>
<head>
  <title>
  新开窗口
  </title>

</head>
<body>
<Script language="JavaScript">
var abc = window.open("1.htm","newWin","toolbar=no,left=200,top=100,menubar=no,width=300,height=100");
</Script>
<input type="button" onclick="JavaScript:abc.focus();" value="跑前面来">
<input type="button" onclick="JavaScript:abc.close();" value="关闭">
</body>
</html>
10.两个窗口的跳转
<html>
<head>
  <title>
  本地窗口
  </title>

</head>
<body>
<Script language="JavaScript">
function go2()
{
   window.location="33.htm";
}
</Script>
<input type="button" value="转向" onclick="JavaScript:go2()">
</body>
</html>

11.返回历史页面

<html>
<head>
  <title>
  本地窗口
  </title>

</head>
<body>
<Script language="JavaScript">
function goBack()
{
   history.back();
}
</Script>
<input type="button" value="返回" onclick="JavaScript:goBack()">
</body>
</html>
12.计算你在某个页面停留多久
<html>
<HEAD>
</HEAD>

<BODY>
<form name="myform">
您在此停留了：
<input name="clock" size="18" value="在线时间">
</form>

<Script language="JavaScript">

var id, iM = 0, iS = 1;
start = new Date();

function go()
{
  now = new Date();
  time = (now.getTime() - start.getTime()) / 1000;
  time = Math.floor( time);

  //秒
  iS = time % 60;
  //分
  iM = Math.floor( time / 60);

  if ( iS < 10)
   document.myform.clock.value = " " + iM + " 分 0" + iS + " 秒";
  else
   document.myform.clock.value = " " + iM + " 分 " + iS + " 秒";
  id = setTimeout( "go()", 1000);
}
go();
    </Script>

</BODY>

</html>
13.检查邮箱的合法性

<HTML>

   function check()
   {
    var tmp,str2;
    //获得text1的值
    str2=document.myform.text1.value;

    tmp=str2.indexOf('@');

    if(tmp<0)
     //字符串中不包含@字符
     alert("请输入合法Email地址");
    else
     //输出 @ 的位置
     alert(tmp);
   }

  </Script>
</HEAD>

<BODY>
   <form name="myform">
  请输入Email地址：<br>
  <input type=text value="" name="text1">
  <p><input type=button value="提交" name="btn1" onClick="check()">
   </form>
</BODY>

</HTML>

13.触发事件

1.点击 onclick=""

2.聚焦 onFocus="JavaScript:alert(document.test.userName.value)

3. 值改变 <input type="text" name="userName" value="SXT" onChange="JavaScript:alert(document.test.userName.value);">

   4.打开和关闭页面的时候出现
   <html>
<head>
</head>
<body onLoad="javascript:alert('hello');" onUnload="javascript:alert('bye-bye');">
  nihao
</body>

</html>

5.鼠标事件onmouseover="'"
onmouseout="''"

6.鼠标选择时 <input type="text" name="userName" value="SXT" onSelect="JavaScript:alert(document.test.userName.value);">