Javascript实用技巧

NONINETEEN

2013-05-28

//1.彻底屏蔽鼠标右键
oncontextmenu="window.event.returnValue=false"
<table border oncontextmenu=return(false)><td>no</table> 可用于Table

//2.取消选取、防止复制
<body onselectstart="return false">

//3.不准粘贴
onpaste="return false" 

//4.防止复制
oncopy="return false;" oncut="return false;"


//5.离开页面时要求确认
window.onbeforeunload = function(){return '';}; //增加事件
window.onbeforeunload = null;   //删除事件


//6.IE地址栏前换成自己的图标
<link rel="Shortcut Icon" href="favicon.ico">

//7.可以在收藏夹中显示出你的图标
<link rel="Bookmark" href="favicon.ico">

//8.关闭输入法
<input style="ime-mode:disabled">


//9.网页将不能被另存为
<noscript><*** src="/*.html>";</***></noscript>


//10.取得控件的绝对位置
//Javascript
<script language="Javascript">
function getIE(e){
var t=e.offsetTop;
var l=e.offsetLeft;
while(e=e.offsetParent){
t+=e.offsetTop;
l+=e.offsetLeft;
}
alert("top="+t+"/nleft="+l);
}
</script>


//11.光标是停在文本框文字的最后
<script language="javascript">
function cc()
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart("character",e.value.length);
r.collapse(true);
r.select();
}
</script>
<input type=text name=text1 value="123" onfocus="cc()">

//12.判断上一页的来源
javascript :
document.referrer

//13.最小化、最大化、关闭窗口
<object id=hh1 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Minimize"></object>
<object id=hh2 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Maximize"></object>
<OBJECT id=hh3 classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11">
<PARAM NAME="Command" value="/Close"></OBJECT>
<input type=button value="/最小化 onclick=hh1.Click()>
<input type=button value="/blog/最大化 onclick=hh2.Click()>
<input type=button value=关闭 onclick=hh3.Click()>
//本例适用于IE

//屏蔽功能键Shift,Alt,Ctrl
<script>
function look(){
if(event.shiftKey)
alert("禁止按Shift键!"); //可以换成ALT　CTRL
}
document.onkeydown=look;
</script>

//网页不会被缓存
<META HTTP-EQUIV="pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
<META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT">
或者<META HTTP-EQUIV="expires" CONTENT="0">

//让弹出窗口总是在最上面:
<body onblur="this.focus();">

//怎样去掉图片链接点击后，图片周围的虚线？
<a href="#" onFocus="this.blur()"><img src="/logo.jpg" border=0></a>

//电子邮件处理提交表单
<form name="form1" method="post" action=mailto:****@***.com
enctype="text/plain">
<input type=submit>
</form>

//在打开的子窗口刷新父窗口的代码里如何写？
window.opener.location.reload()


//在页面中如何加入不是满铺的背景图片,拉动页面时背景图不动
<STYLE>
body
{background-image:url(/logo.gif); background-repeat:no-repeat;
background-position:center;background-attachment: fixed}
</STYLE>


//怎么判断是否是字符
if (/[^/x00-/xff]/g.test(s)) alert("含有汉字");
else alert("全是字符");

TEXTAREA自适应文字行数的多少
<textarea rows=1 name=s1 cols=27 onpropertychange
="this.style.posHeight=this.scrollHeight">
</textarea>


//选择了哪一个Radio
<HTML><script language="vbscript">
function checkme()
for each ob in radio1
if ob.checked then
window.alert ob.value
next
end function
</script><BODY>
<INPUT name="radio1" type="radio" value="/style" checked>Style
<INPUT name="radio1" type="radio" value="/blog/barcode">Barcode
<INPUT type="button" value="check" onclick="checkme()">
</BODY></HTML>

//脚本永不出错
<SCRIPT LANGUAGE="JavaScript">
<!-- Hide
function killErrors() {
return true;
}
window.onerror = killErrors;
// -->
</SCRIPT>

javascript