//show image
function setImage(field, file, upload_dir){
    document.getElementById(field).src = upload_dir + "/" + file;
    document.getElementById(field + "_input").value = file;
    if(file !="")
        document.getElementById(field).style.display = "block";
    else
        document.getElementById(field).style.display = "none";
}


//delete image
function setHidden(field, file, upload_dir){
    document.getElementById(field).value = upload_dir + file;
}

//file to big
function setError(field, message){
    document.getElementById(field).src = "";
    document.getElementById(field).style.display = "none";
    document.getElementById(field + "_input").value = message;
}