Код:
if(window.location.hash){
var arr = window.location.href.split(''), lastVal = arr[arr.length-1];
if(arr[arr.length-2] == '?' && (lastVal == 1 || lastVal == 2 || lastVal == 3)){
arr.length = arr.length - 2;
window.location.href = arr.join('');
}
}