javascript - Clear browser history

Question

I wrote the following code to clear the browser history and it's working correctly in Internet Explorer but it does not work in Mozilla Firefox. How can I solve this problem?

<script language="JavaScript">
function DisablingBackFunctionality()
{
    var URL;
    var i ;
    var QryStrValue;
    URL=window.location.href ;
    i=URL.indexOf("?");
    QryStrValue=URL.substring(i+1);
    if (QryStrValue!='X')
    {
        window.location.href="http://localhost:8085/FruitShop/";
    }
}
</script>

I'm writing this code in <header> section.

Answer 1

1. Do NOT try to break the back button
2. Instead on the page you want not to return to use location.replace(url)

Also your code can be vastly simplified - but be aware it does not CLEAR the history. You cannot clear the history, only keep a page from getting into the history or as you try, break the back button

function DisablingBackFunctionality() {
// get the query string including ?
  var passed =window.location.search; 
// did we receive ?X
  if (passed && passed.substring(1) =="X") { 
// if so, replace the page in the browser (overwriting this page in the history)
    window.location.replace("http://localhost:8085/FruitShop/"); 
  }
}