how to send ctrl+alt+del for windows？

[huge818]

chrome 61.0.3163.79

var sendKey=function(type,n){
var obj={
'generated': true,
'type': type,
'keyCode': n,
'charCode': 0
};
//inputProcess object,window.inputProcess=
//in application.js init， window.inputProcess=this.inputProcess;
window.inputProcess.send([type,[obj]], type);
}

// It is no effect!
var sendCtrlAltDel=function(){
sendKey("keydown",17);
sendKey("keydown",18);
sendKey("keydown",110);
sendKey("keyup",110);
sendKey("keyup",18);
sendKey("keyup",17);
}

but,
// this is ok! work well!
var sendCtrlC=function(){
sendKey("keydown",17);
sendKey("keydown",67);
sendKey("keyup",67);
sendKey("keyup",17);
}

[huge818]

why?

[huge818]

there is no effect for alt key, it is send no message

[mezues]

because the keyCode of del is 46