variable not incrementing

Question

var ro = 0;

function updatePR(sel){
    if(sel.value==1){
        $(".holder").append("<div id='simulador-"+ro+"'></div>");
        $("#simulador-"+ro).load("inv-imo.php .IM");
        ro=ro++;
    }else if(sel.value==2){
        $(".holder").append("<div id='simulador-"+ro+"'></div>");
        $("#simulador-"+ro).load("poupanca.php .SP");
        ro=ro++;
    }else if(sel.value==3){
        $(".holder").append();
    }
}

I have this code and I'm having trouble with the variable ro, which doesn't increment.

Everytime that I run the function, ro is always 0.

Anyone knows why?

Answer 1

Replace this ro=ro++; with this ro++; or this ro=ro+1.