function nextStep1(){
    label_form.todo.value="step2";
    if (label_form.chose_template.checked){
        label_form.chosen_template.value="2";
    }
    else{
        label_form.chosen_template.value="1";
    }
    if (label_form.chosen_template.value == "2" && label_form.image_path.value==""){
        if(label_form.image_file.value == ""){
            alert("You must choose an image");
        }
        else if (label_form.image_file.value.substr(label_form.image_file.value.length-4).toLowerCase( ) != ".jpeg" &&
                 label_form.image_file.value.substr(label_form.image_file.value.length-4).toLowerCase( ) != ".jpg" &&
                 label_form.image_file.value.substr(label_form.image_file.value.length-4).toLowerCase( ) != ".gif" ){
            alert("An image must be of GIF or JPEG format");
        }
        else{
            label_form.submit();
        }
    }
    else if (label_form.chosen_template.value == "2" && label_form.image_path.value!=""){
        label_form.submit();
    }
    else{
        label_form.image_path.value="";
        label_form.submit();
    }
}

function backStep1(){
    label_form.todo.value="general";
    label_form.submit();
}

function nextStep2(){
    label_form.todo.value="step3";
    label_form.posted.value="posted";
    label_form.line1.value="";
    label_form.line2.value="";
    label_form.line3.value="";
    label_form.line4.value="";
    label_form.line5.value="";
    for (var i=0; i<label_form.lineList.options.length; i++){
        label_form.all["line"+(i+1)].value=label_form.lineList.options.item(i).value;
    }
    label_form.submit();
    /*if (label_form.chose_template.value == "2" && label_form.image_path.value==""){
        if(label_form.image_file.value == ""){
            alert("You must choose an image");
        }
        else if (label_form.image_file.value.substr(label_form.image_file.value.length-4).toLowerCase( ) != ".jpeg" &&
                 label_form.image_file.value.substr(label_form.image_file.value.length-4).toLowerCase( ) != ".jpg" &&
                 label_form.image_file.value.substr(label_form.image_file.value.length-4).toLowerCase( ) != ".gif" ){
            alert("An image must be of GIF or JPEG format");
        }
        else{
            label_form.submit();
        }
    }
    else{
        label_form.submit();
    }*/
}

function backStep2(){
    label_form.todo.value="step1";
    label_form.submit();
}

function nextStep3(){
    label_form.todo.value="step4";
    label_form.submit();
}

function backStep3(){
    label_form.todo.value="step2";
    label_form.submit();
}

function setTodo(newTodo){
    label_form.todo.value=newTodo;
}

function showImage(){
    if (label_form.chose_template.checked){
        image_div.style.display="block";
    }
    else{
        image_div.style.display="none";
    }
}

function addLine(input, select){
    if (input.value==""){
        alert("Line can't be blank");
    }
    else if (select.options.length==5){
        alert("You can add maximum 5 lines");
    }
    else{
        var oOption = document.createElement("OPTION");
        oOption.text=input.value;
        oOption.value=input.value;
        select.options.add(oOption);
    }
}

function deleteLine(select){
    for (var i=0; i<select.options.length; i++){
        if (select.options.item(i).selected){
            select.options.remove(i);
            break;
        }
    }
}

function  fillLineList(select){
    var oOption;
    for (var i=1; i<=5; i++){
        if (label_form.all["line"+i].value!=""){
            oOption = document.createElement("OPTION");
            oOption.text=label_form.all["line"+i].value;
            oOption.value=label_form.all["line"+i].value;
            select.options.add(oOption);
        }
    }
}

function historyBack(){
    label_form.todo.value="general";
    label_form.submit();
}