split up string with delimiter only using basic language(if,for,while etc)

i have the function:

//this function takes two params, a string and then the delimiter where the string is to be split up
function substringSplit(str, del){
    var str;
    var del;
    for(var i=0;i<str.length;i++){
        if(!str[i]==del){
            var res = str[i];
            console.log(res);
        }
    }

and what i am trying to achieve is splitting up a string e.g "the house is there" with a delimiter i.e " ", however my code isnt doing this properly!

does any one have any suggestions?

ps the idea is to not use another functions i.e split().