解除切屏限制

//屏蔽切屏限制
window.οnblur=null
window.οnblur=function(){console.debug(1);}

//解除快捷键操作屏蔽
window.onkeyup = window.onkeydown = window.onKeyPress = document.onkeyup = document.onkeydown = document.onKeyPress = document.body.onkeyup = document.body.onkeydown = document.body.onKeyPress = onkeyup = onkeydown = onKeyPress = null;

//解除复制粘贴限制
window.oncopy = window.onpaste = document.oncopy = document.onpaste = document.body.oncopy = document.body.onpaste = oncopy = onpaste = null;