js 技巧 (三)


//无模式的提示框 function modelessAlert(Msg) 
{ 
   window.showModelessDialog("javascript:alert("""+escape(Msg)+""");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");
} 



//屏蔽按键 
<html> 
<head> 
  <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
  <noscript><meta http-equiv="refresh" content="0;url=about:noscript"></noscript> 
  <title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title> 
</head> 
<body> 
<script language="Javascript"><!-- 
  //屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键 
  //Author: meizz(梅花雨) 2002-6-18 
function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键 
function window.onhelp(){return false} //屏蔽F1帮助 
function document.onkeydown() 
{ 
  if ((window.event.altKey)&& 
      ((window.event.keyCode==37)||   //屏蔽 Alt+ 方向键 ← 
       (window.event.keyCode==39)))   //屏蔽 Alt+ 方向键 → 
  { 
     alert("不准你使用ALT+方向键前进或后退网页!"); 
     event.returnValue=false; 
  } 
     /* 注:这还不是真正地屏蔽 Alt+ 方向键, 
     因为 Alt+ 方向键弹出警告框时,按住 Alt 键不放, 
     用鼠标点掉警告框,这种屏蔽方法就失效了。以后若 
     有哪位高手有真正屏蔽 Alt 键的方法,请告知。*/ 
  if ((event.keyCode==8)  ||                 //屏蔽退格删除键 
      (event.keyCode==116)||                 //屏蔽 F5 刷新键 
      (event.ctrlKey && event.keyCode==82)){ //Ctrl + R 
     event.keyCode=0; 
     event.returnValue=false; 
     } 
  if (event.keyCode==122){event.keyCode=0;event.returnValue=false;}  //屏蔽F11 
  if (event.ctrlKey && event.keyCode==78) event.returnValue=false;   //屏蔽 Ctrl+n 
  if (event.shiftKey && event.keyCode==121)event.returnValue=false;  //屏蔽 shift+F10 
  if (window.event.srcElement.tagName == "A" && window.event.shiftKey)  
      window.event.returnValue = false;             //屏蔽 shift 加鼠标左键新开一网页 
  if ((window.event.altKey)&&(window.event.keyCode==115))             //屏蔽Alt+F4 
  { 
      window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); 
      return false; 
  } 
} 
</script> 
屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键 
</body> 
</html> 


//屏蔽打印 
<style> 
@media print{ 
* {display:none} 
} 
</style> 


//移动的图层,拖动 

1.<span style='position:absolute;200;height:200;background:red' onmousedown=MouseDown(this) onmousemove=MouseMove() onmouseup=MouseUp()>meizz</span> 
<script language=javascript> 
var Obj; 
function MouseDown(obj) 
{ 
  Obj=obj; 
  Obj.setCapture(); 
  Obj.l=event.x-Obj.style.pixelLeft; 
  Obj.t=event.y-Obj.style.pixelTop; 
} 
function MouseMove() 
{ 
  if(Obj!=null) 
  { 
    Obj.style.left = event.x-Obj.l; 
    Obj.style.top = event.y-Obj.t; 
  } 
} 
function MouseUp() 
{ 
  if(Obj!=null) 
  { 
    Obj.releaseCapture(); 
    Obj=null; 
  } 
} 
</script> 
2. 
<div id="myDiv" src="logo.gif" ondrag="doDrag();" onmouseover="this.style.cursor='hand'" onmousedown="doMouseDown();"> 
<a href="#" onclick="return false"><h1>wlecome</h1></a> 
</div> 
<script language="JavaScript" type="text/javascript"> 
var orgMouseX; 
var orgMouseY; 
var orgObjX; 
var orgObjY; 
function doDrag() 
{ 
var myObject=document.all.myDiv; 

var x=event.clientX; 
var y=event.clientY; 
myObject.style.left=x-(orgMouseX-orgObjX); 
myObject.style.top=y-(orgMouseY-orgObjY); 
  
} 
function doMouseDown() 
{ 
orgMouseX=event.clientX; 
orgMouseY=event.clientY; 
orgObjX=parseInt(document.all.myDiv.style.left); 
orgObjY=parseInt(document.all.myDiv.style.top); 
} 

</script> 
  
//文档状态改变 

<iframe src="a.html" id="f" name="f" scrolling="no" frameborder=0 marginwidth=0 marginheight=0></iframe> 
<script> 
var doc=window.frames["f"].document; 
function s(){ 
if (doc.readyState=="complete"){ 
  document.all.f.style.height=doc.body.scrollHeight 
  document.all.f.style.width=doc.body.scrollWidth 
} 
} 
doc.onreadystatechange=s 
</script> 


//刷新后不变的文本框 <HTML> 
<HEAD> 
<META NAME="save" CONTENT="history"> 
<STYLE> 
   .sHistory {behavior:url(#default#savehistory);} 
</STYLE> 
</HEAD> 
<BODY> 
<INPUT class="sHistory" type=text id=oPersistInput> 
</BODY> 
</HTML> 

//访问剪贴板 

event.dataTransfer.setData("URL", oImage.src); 
sImageURL = event.dataTransfer.getData("URL") 
(2)普通访问 
window.clipboardData.setData("Text",oSource.innerText); 
window.clipboardData.getData("Text"); 


//操作COOKIE 

function SetCookie(sName, sValue) 
{ 
document.cookie = sName + "=" + escape(sValue) + "; "; 
} 
function GetCookie(sName) 
{ 
var aCookie = document.cookie.split("; "); 
for (var i=0; i < aCookie.length; i++) 
{ 
   
  var aCrumb = aCookie.split("="); 
  if (sName == aCrumb[0])  
  return unescape(aCrumb[1]); 
} 
  
} 
function DelCookie(sName) 
{ 
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;"; 
} 


//setTimeout增加参数 

<script> 
var _st = window.setTimeout; 
window.setTimeout = function(fRef, mDelay) { 
if(typeof fRef == 'function'){ 
  var argu = Array.prototype.slice.call(arguments,2); 
  var f = (function(){ fRef.apply(null, argu); }); 
  return _st(f, mDelay); 
} 
return _st(fRef,mDelay); 
} 
function test(x){ 
alert(x); 
} 
window.setTimeout(test,1000,'fason'); 
</script> 


//自定义的apply,call 

Function.prototype.apply = function (obj, argu) { 
if (obj) obj.constructor.prototype._caller = this;  
var argus = new Array(); 
for (var i=0;i<argu.length;i++) 
  argus = "argu[" + i + "]"; 
var r; 
eval("r = " + (obj ? ("obj._caller(" + argus.join(",") + ");") : ("this(" + argus.join(",") + ");"))); 
return r; 
}; 
Function.prototype.call = function (obj) { 
var argu = new Array(); 
for (var i=1;i<arguments.length;i++) 
  argu[i-1] = arguments; 
return this.apply(obj, argu); 
};       

  出处至:http://xiaobingandxiaoer.iteye.com/blog/1917696

原文地址:https://www.cnblogs.com/bcphp/p/7080199.html