Usage examples of shielding in js_javascript skills

js屏蔽效果

复制代码 代码如下:

/**Block F1 help*/
window.onhelp = function(){return false;}
/**
*Block F5, Ctrl N, Shift F10, Alt F4
*If you want to block other keys, find the corresponding keyCode and follow this method
*/
document.onkeydown = function(event){
event = window.event || event;
if(event.keyCode==116 || (event.ctrlKey && event.keyCode==78) || (event.shiftKey && event.keyCode==121) || (event.altKey && event.keyCode==115)){
event.keyCode =0;
event.returnvalue = false;
}
}
/**Block the right mouse button*/
document.oncontextmenu = function(){return false;}
//或者
document.onmousedown = function(event){
event = window.event || event;
if(document.all && event.button == 2) {
event.returnvalue=false;
}
}
/**
* Block the "Back" function (Google)
* @param url The URL to which the page should be redirected
*/
function replaceLocation(url){
document.location.replace(url);
}
/**Block selected web content*/
document.onselectstart=function(){return false;}
/**Block copying of web content*/
document.body.oncopy = function(){return false;}
/**Block and cut web content*/
document.body.oncut = function(){return false;}
/**Block pasting of content into web pages*/
document.body.onpaste = function(){return false;}
/**Block screen copying (clear the clipboard continuously)*/
window.setInterval('window.clipboardData("Text", "")', 100);
/**
* Block viewing of source files ( )
*/
function clear() {
var source=document.body.firstChild.data;
document.open();
document.close();
document.body.innerHTML = source;
}
/**
* Block js error reporting
*/
function KillError()
{
　　return true;
}
window.onerror=KillError;