function enable()
{
    if(document.getElementById('step_1_upload_image'))
        document.getElementById('step_1_upload_image').disabled = true;
}

var HttpRequestObject = false;

if(window.XMLHttpRequest) {
   HttpRequestObject = new XMLHttpRequest();
}
else if(window.ActiveXObject) {
   HttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
}

function startProgress(file_id) {

   document.getElementById('step_1_upload').style.display = 'none';
   document.getElementById('progress_bar').style.display = 'block';
   document.getElementById('progress_bar_outside').style.display = 'block';
   document.getElementById('progress_bar_text').style.display = 'block';
   setTimeout('getProgress("' + file_id + '")', 1000);
}
function getProgress(file_id)
{
    if(HttpRequestObject)
    {
        HttpRequestObject.open('GET', '/progress.php?file_id=' + file_id, true);
        HttpRequestObject.onreadystatechange = function()
        {
            if(HttpRequestObject.readyState == 4 && HttpRequestObject.status == 200)
            {
                var progress = eval('('+HttpRequestObject.responseText+')');
                var percent = Math.round(progress.current / progress.total * 100);
                var progress_bar_file_name = progress.filename;
                var progress_bar_file_size = (progress.total / 1024) / 1024;
                progress_bar_file_size = Math.round(progress_bar_file_size * Math.pow(10,2)) / Math.pow(10,2);
                document.getElementById('progress_bar_inside').style.width = percent + '%';
                document.getElementById('progress_bar_inside').innerHTML = percent + '%';
                document.getElementById('progress_bar_file_statuss').innerHTML = 'datnes ' + progress_bar_file_name + ' (' + progress_bar_file_size + 'MB) augšupielādes statuss:';
                
                if(percent < 100)
                    setTimeout('getProgress("' + file_id + '")', 100);
            }
        }
      HttpRequestObject.send(null);
    }
}


function check_file(a)
{
    document.getElementById('step_1_upload_image').disabled = true;

    var file_value = a.value;
    file_value = /([^\\]+)$/.exec(file_value)[1];
    var file_value_length = file_value.length;
    var pos = file_value.lastIndexOf('.') + 1;
    var ext = file_value.substring(pos, file_value_length);
    var file_ext = ext.toLowerCase();

    if(check_file2(file_ext))
    {
        document.getElementById('step_1_upload_image').disabled = false;
        document.getElementById('step_1_info').innerHTML = '<span class="green">norādīta datne - "' + file_value + '"</span><br />';
    }
    else
    {
        document.getElementById('step_1_upload_image').disabled = true;
        document.getElementById('step_1_info').innerHTML = '<span class="red">neatļauta tipa datne ".' + file_ext + '"<span><br />';
        return false;
    }
}
function check_file2(file_ext)
{
    var extensions = new Array('jpg', 'jpeg');
    for (i = 0; i < extensions.length; i++)
    {
        if(extensions[i] == file_ext)
        {
            return true;
        }
    }

    return false;
}