//AJAX Uploader - Oct 5 - v1.2.2
//Copyright 2011 http://codeeverywhere.ca
try
{
	if(navigator.appVersion.indexOf("MSIE") != -1)
		throw "IE - Use Fallback";
		
    
    var xhr = new XMLHttpRequest();
    if (xhr.onload !== undefined && xhr.addEventListener !== undefined) //<-----------------------------------------------
    {
    	//Browser supports W3C Progress Events

        var upload = function()
        {
        	document.getElementById('form').setAttribute('onsubmit', 'return false');
        	
        	var e = document.getElementById('files');
            var url = "upload.php?ajax";
            var file = e.files[0];
            
            //if file is empty, return false;
            if(e.files[0] == undefined)
            {
            	alert('File Field Empty');
            	return false;
            }
            
            //file size to large
            var max = document.getElementsByName("MAX_FILE_SIZE");
        	if(file.size > max[0].value)
        	{
        		alert('File Too Large');
        		return false;
        	}
            
            document.getElementById('submit_btn').setAttribute('value', '\u2191 Uploading...');

            //var xhr = new XMLHttpRequest();
            xhr.file = file; //--
            xhr.addEventListener('progress', function(e)
            {
            	var done = e.position || e.loaded, total = e.totalSize || e.total;            	
            	
            }, false);
            
            if(xhr.upload)
            {
            	xhr.upload.onprogress = function(e)
            	{
            		var done = e.position || e.loaded, total = e.totalSize || e.total;
            		var width = (Math.floor(done / total * 100)) * 3.5;

            		//Move up progress bar
            		document.getElementById('progress_done').style.width = width + 'px';
            		document.getElementById('num').innerHTML = (Math.floor(done / total * 1000) / 10) + '%';
                };
            }
            
            xhr.onreadystatechange = function(e)
            {
            	if(4 == this.readyState)
            	{
                    document.getElementById('num').innerHTML = this.responseText;
                    document.getElementById('submit_btn').setAttribute('value', '\u2191 Upload File');
                }
            };

                xhr.open('POST', url, true);
                xhr.setRequestHeader("Content-Type", "multipart/form-data");
                xhr.setRequestHeader("Cache-Control", "no-cache");
                xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
                xhr.setRequestHeader("X-File-Name", file.name);
                xhr.setRequestHeader("X-File-Size", file.size);                
                xhr.setRequestHeader("X-File-Type", file.type);
                xhr.setRequestHeader("Content-Type", "multipart/form-data");
                xhr.send(file);
                
            };
    }
    else
    {
    	throw 'Run Fallback';
    }
}
catch(e)
{
	//Fallback, use iframe method	
	
	window.onload = function()
	{		
		if(	navigator.appVersion.indexOf("MSIE 7") != -1 ||
			navigator.appVersion.indexOf("MSIE 6") != -1 ||
			navigator.appVersion.indexOf("MSIE 5") != -1  )
			{
				document.getElementById('progress_outline').style.display = 'none'; //------------------
				document.getElementById('frame').style.display = 'block'; //----------------------------
			}
	}
	
	var upload = function()
	{
		document.getElementById('form').setAttribute('onsubmit', 'return false');
		var e = document.getElementById('files').value;		
		if(e.length == 0)
		{
          	alert('File Field Empty');
           	return false;
         }
         
        //file size to large
        var max = document.getElementsByName("MAX_FILE_SIZE");
       	if(e.size > max[0].value)
       	{
       		alert('File Too Large');
       		return false;
       	}
		
		document.getElementById('progress_bar').style.backgroundColor = '#e6e6e6';//<------------------------------
		document.getElementById('submit_btn').setAttribute('value', '\u2191 Uploading...');
		
		document.getElementById('form').setAttribute('target', 'frame');
		document.getElementById('num').innerHTML = '<img src="ajax-loader.gif" alt="ajax-loader" width="16" height="11" /> Uploading...';
		document.getElementById('frame').setAttribute('onload', 'uploaded();');
		form.submit();
	};

    var uploaded = function()//-----------------------------------------------------------------------
    {
       	document.getElementById('progress_bar').style.backgroundColor = '#e7f6e2';
    	document.getElementById('submit_btn').setAttribute('value', '\u2191 Upload File');
    	
    	var shortURL = window.frames['frame'].document.getElementsByTagName('body')[0].innerHTML;
    	
    	if( shortURL.length == 0 )
    	{
    		document.getElementById('progress_bar').style.backgroundColor = '#d56a68';
    		document.getElementById('num').innerHTML = 'Sorry, problem during upload.';
    	}else
    	{
    		document.getElementById('num').innerHTML = shortURL;
    	}
    };//-------------------------------------------------
}