Question

I have this javascript:

function updatePage() {   
if (request.readyState == 4)
    if (request.status == 200)
        var data = JSON.parse(request.responseText);
        update_select($('select[name=island_name]'), data);
    else if (request.status == 404)
        alert("Request url does not exist");
    else
        alert("Error: status code is " + request.status);
}  

But I keep getting aUncaught SyntaxError: Unexpected token if error which halts my script. Any ideas?

Answer 1

You’re missing a bunch of braces, and on the update_select() line, it is causing a problem. The braces aren’t strictly required for most of these blocks, but because you are attempting to execute two statements in the first if() you’ll need them. Best to put them in everywhere.

function updatePage() {   
  if (request.readyState == 4) {
    if (request.status == 200) {
        var data = JSON.parse(request.responseText);
        // Second statement executed after the if() 
        // MUST use {} on this block
        update_select($('select[name=island_name]'), data);
    }
    else if (request.status == 404) {
        alert("Request url does not exist");
    }
    else {
        alert("Error: status code is " + request.status);
    }
  }
}