while(that.funcns.length>0){
  fn=that.funcns.splice(0,1)[0];
  fn.idx=i;
  window.setTimeout(function(){
    fn.ref(); //call function reference
  },(idx==0)?idx:1000);
}
//fn - {ref:functionReference,order:true/false};

var funcs = [/* array of functions */];

function next() {
    var func = funcs.shift();
    if(func) {
        func();
        setTimeout(next, 100);
    }
}

next();

var funcCount = 0, funcList = [];

function executeFunctions() {
    var nextFunc;

    while (funcList.length > 0) {
        // Check next in list, if we need to wait, make sure we wait
        nextFunc = funcList[0];
        if (nextFunc.needToWait) {
            if (funcCount > 0) {
                // Try again later
                setTimeout(executeFunctions, 100);
                return;
            }
        }

        // Since we are now going to execute, remove from list and execute
        funcList.splice(0, 1);
        funcCount += 1;    // nextFunc will subtract 1 on completion
        setTimeout(nextFunc, 100);
    }
}

// For async functions to call back to completion
function completionCallback() {
    funcCount -= 1;
}

// Example function 1 is simulated async
function example1() {
    alert("Example1");

    // Simulate async call with completion callback function, e.g. XHttpRequest
    setTimeout(completionCallback, 2000);
}
example1.needToWait = false;     // Not flagged

// Example function is flagged as need others to complete first
function example2() {
    alert("Example2");

    funcCount -= 1;
}
example2.needToWait = true;

// Setup function list to execute example1 then example2
funcList.push(example1);
funcList.push(example2);

// OK, test it
executeFunctions();