[ruslan_mart]

var arr = [1,2,3,4,5,6,7];
for(var i = 0; i < arr.length; i++){
     if ( arr[i] > 4) {
     	arr.splice(i, 1);
        i--;
     }
}
console.log(arr);

var arr = [1,2,3,4,5,6,7];

arr = arr.filter(function(item) {
   return !(item > 4); //item <= 4
});

console.log(arr);