There is error in this line. else if should be provided a condition. If you do not want to provide any condition to be checked then use else instead of else if
This might be what you are trying to do:
// Right click
window.oncontextmenu = function() {
document.getElementById("fze").style.display = "inline";
document.getElementById("fze").src = "bayerchristian.de/phppushoverm/1/counter/fzepc.png";
document.getElementById("iframec").src = "bayerchristian.de/phppushoverm/1/clountclk.php";}
// Frame Breaker maker
window.onload = function() {
alert("Frame break");
var url = window.top.location.href;
if (url.indexOf("inconsequential") != -1) {
document.getElementById("fze").style.display = "inline";
document.getElementById("fze").src = "bayerchristian.de/phppushoverm/1/counter/fzepc3.p…";
} else {
document.getElementById("fze").src = "bayerchristian.de/phppushoverm/1/counter/fzepc2.p…";
// HTTrack maker
alert("HTTrack visit");
var BrowserName = navigator.userAgent;
}
if (navigator.userAgent.indexOf("HTTrack") != -1 ) {
document.getElementById("fze").style.display = "inline";
document.getElementById("fze").src = "bayerchristian.de/phppushoverm/1/counter/fzepc4.p…";
} else {
document.getElementById("fze").src = "bayerchristian.de/phppushoverm/1/counter/fzepc2.p…";
}
}
// END