Chống website khác link tới javascript của bạn

//Beginning of "test.js" file
var accepted_domains=new Array("vnvista.com","mysite.com")

var domaincheck=document.location.href //retrieve the current URL of user browser
var accepted_ok=false //set acess to false by default

if (domaincheck.indexOf("http")!=-1){ //if this is a http request
for (r=0;r<accepted_domains.length;r++){
if (domaincheck.indexOf(accepted_domains[r])!=-1){ //if a match is found
accepted_ok=true //set access to true, and break out of loop
break
}
}
}
else
accepted_ok=true

if (!accepted_ok){
alert("You\'re not allowed to directly link to this .js file on our server!")
history.back(-1)
}

/////rest of your libray