Question

So I have a js function :

function addNewUpload()
{
    if(formNumber == 1){
        displayRemove();
    }

    if(formNumber != 10){
        var html = " <div id='u_"+(formNumber+1)+"' > ";
        //html += " description : <input type='text' name='desc[]' /> <br> ";
        html += " photo : <input type='file' name='file[]' />   ";
        html += " </div> ";
        document.getElementById('uploadHolder').innerHTML += html;

        formNumber = formNumber + 1;
    } else {
        alert("You can only upload 10 photos.");
    }                                                                               
}

it works fine except that it removes the values from the fields that were already added using this function. How can I stop it from doing so?

Answer 1

You should be using DOM methods like appendChild and createNewElement etc.

Try something along these lines:

http://jsfiddle.net/9YHs8/ (in this example, “file” for type was changed to text for demo purposes).

function addNewUpload()
{
    if(formNumber == 1){
        displayRemove();
    }

    if(formNumber != 10){
        var d = document.createElement("div");
        d.id = "u_" + formNumber;
        var i = document.createElement("input");
        i.type = "file";
        i.name = "file[]";
        d.appendChild(document.createTextNode(" photo : "));
        d.appendChild(i);
        document.getElementById('uploadHolder').appendChild(d);

        formNumber++;
    } else {
        alert("You can only upload 10 photos.");
    }                                                                               
}