jQuery.extend({
	

    createUploadIframe: function(id, uri)
	{
			//create frame
            var frameId = 'jUploadFrame' + id;
            
            if(window.ActiveXObject) {
                var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
                if(typeof uri== 'boolean'){
                    io.src = 'javascript:false';
                }
                else if(typeof uri== 'string'){
                    io.src = uri;
                }
            }
            else {
                var io = document.createElement('iframe');
                io.id = frameId;
                io.name = frameId;
            }
            io.style.position = 'absolute';
            io.style.top = '-1000px';
            io.style.left = '-1000px';

            document.body.appendChild(io);

            return io			
    },
    createUploadForm: function(id, fileElementId)
	{
		//create form	
		var formId = 'jUploadForm' + id;
		var fileId = 'jUploadFile' + id;
		var form = $('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');	
		var oldElement = $('#' + fileElementId);
		var newElement = $(oldElement).clone();
		$(oldElement).attr('id', fileId);
		$(oldElement).before(newElement);
		$(oldElement).appendTo(form);
		//set attributes
		$(form).css('position', 'absolute');
		$(form).css('top', '-1200px');
		$(form).css('left', '-1200px');
		$(form).appendTo('body');		
		return form;
    },

    ajaxFileUpload: function(s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout		
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()        
		var form = jQuery.createUploadForm(id, s.fileElementId);
		var io = jQuery.createUploadIframe(id, s.secureuri);
		var frameId = 'jUploadFrame' + id;
		var formId = 'jUploadForm' + id;		
        // Watch for a new set of requests
        if ( s.global && ! jQuery.active++ )
		{
			jQuery.event.trigger( "ajaxStart" );
		}            
        var requestDone = false;
        // Create the request object
        var xml = {}   
        if ( s.global )
            jQuery.event.trigger("ajaxSend", [xml, s]);
        // Wait for a response to come back
        var uploadCallback = function(isTimeout)
		{			
			var io = document.getElementById(frameId);
            try 
			{				
				if(io.contentWindow)
				{
					 xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
                	 xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
					 
				}else if(io.contentDocument)
				{
					 xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
                	xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
				}						
            }catch(e)
			{
				jQuery.handleError(s, xml, null, e);
			}

            if ( xml || isTimeout == "timeout") 
			{				
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if ( status != "error" ){
                    	
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData( xml, s.dataType );
                            
                        // If a local callback was specified, fire it and pass it the data
                        if ( s.success ){
                            s.success( data, status );
                        }
						    
                        // Fire the global callback
                        if( s.global ){
                            jQuery.event.trigger( "ajaxSuccess", [xml, s] );
                        }
                    } else
                        jQuery.handleError(s, xml, status);
                } catch(e){
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }

                // The request was completed
                if( s.global )
                    jQuery.event.trigger( "ajaxComplete", [xml, s] );

                // Handle the global AJAX counter
                if ( s.global && ! --jQuery.active )
                    jQuery.event.trigger( "ajaxStop" );

                // Process result
                if ( s.complete )
                    s.complete(xml, status);

                jQuery(io).unbind()

                setTimeout(function()
									{	try 
										{
											$(io).remove();
											$(form).remove();	
											
										} catch(e) 
										{
											jQuery.handleError(s, xml, null, e);
										}									

									}, 100)

                xml = null

            }
        }
        // Timeout checker
        if ( s.timeout > 0 ) 
		{
            setTimeout(function(){
                // Check to see if the request is still happening
                if( !requestDone ) uploadCallback( "timeout" );
            }, s.timeout);
        }
        try 
		{
           // var io = $('#' + frameId);
			var form = $('#' + formId);
			$(form).attr('action', s.url);
			$(form).attr('method', 'POST');
			$(form).attr('target', frameId);
            if(form.encoding)
			{
                form.encoding = 'multipart/form-data';				
            }
            else
			{				
                form.enctype = 'multipart/form-data';
            }			
            $(form).submit();

        } catch(e) 
		{			
            jQuery.handleError(s, xml, null, e);
        }
        if(window.attachEvent){
            document.getElementById(frameId).attachEvent('onload', uploadCallback);
        }
        else{
            document.getElementById(frameId).addEventListener('load', uploadCallback, false);
        } 		
        return {abort: function () {}};	

    },

    uploadHttpData: function( r, type ) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;
        // If the type is "script", eval it in global context
        if ( type == "script" )
            jQuery.globalEval( data );
        // Get the JavaScript object, if JSON is used.
        if ( type == "json" ){
            eval( "data = " + data );
        }
        // evaluate scripts within html
        if ( type == "html" )
            jQuery("<div>").html(data).evalScripts();

//alert($('param', data).each(function(){alert($(this).attr('value'));}));
        return data;
    }
})

function ajaxFileUpload()
{
	upload_status = 0;

	$("#loading")
	.ajaxStart(function(){
		upload_status = 1;
		$(this).show();
	})
	.ajaxComplete(function(){
		upload_status = 0;
		$(this).hide();
	});

	// adds a var setting jqUploader to 1, so you can use it for serverside processing
	//prepender = (actionURL.lastIndexOf("?") != -1) ? "&action=upload&": "?action=upload&";
	//actionURL = actionURL+prepender+'jqUploader=1';
	
	//actionURL = 'upload.php';	//hy
	actionURL = 'ajax.php?ajax_action=ajax_upload';

	$.ajaxFileUpload
	(
		{
			url:actionURL,
			secureuri:false,
			fileElementId:'sourcefile_field',
			dataType: 'json',
			success: function (data, status)
			{
				var $this = jQuery(this);
				
				if(typeof(data.error) != 'undefined')
				{
					if(data.error != '')
					{
						$("#upload_message").html('<span class="error">'+data.error+'</span>');
					}else
					{
					
						filename = data.msg.substr(5);
						savename = data.save;

						if(typeof(imgdivid) == 'undefined')
						{
							var ul = document.getElementById(lstName);
							var ui = ul.getElementsByTagName("li");
						}

						if(stop == -1 && typeof(imgdivid) != 'undefined')
						{
							var imgdiv = document.getElementById(imgdivid);
							imgdiv.innerHTML = '<div><img src="/specs/'+filepath+'/'+savename+'" lowsrc="/specs/sites/'+app+'/images/picture-default-assign-free.gif" border="0" width="160" class="picture"><div class="links"><a href="javascript:void(0)" onclick="this.parentNode.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode.parentNode); jQuery(\'#upload_message\').html(\'Please upload a file below:\'); return false;" class="delete"><img src="/specs/sites/'+app+'/images/icon-delete.gif" border="0" alt="Delete" />Remove</a></div><input name="saved_logo" type="hidden" value="'+filename+'"/></div>';
						}else if(ui.length >= stop)
						{
							alert("You have reached your maximum allowed image count.");
						}else{
							var li = document.createElement("li");
							li.innerHTML = '<img src="/specs/'+filepath+'/'+savename+'" lowsrc="/specs/sites/'+app+'/images/picture-default-assign-free.gif" border="0" class="picture"><div class="links"><div class="text"><a href="javascript:void(0)" onclick="this.parentNode.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode.parentNode); jQuery(\'#upload_message\').html(\'Please upload a file below:\'); jQuery(\'#sourcefile_field\').show(); return false;" class="delete"><img src="/specs/sites/'+app+'/images/icon-delete.gif" border="0" alt="Delete" />Remove</a></div><input name="imgconfirm[]" type="hidden" value="'+savename+'"/>';
							ul.appendChild(li);
						}

						if(stop == -1)
						{	cont_msg = "";}
						else if(ui.length < stop)
						{	cont_msg = "";}
						else{	cont_msg = "<br />You have reached your maximum image count.";
							$("#sourcefile_field").hide(); }

						$("#sourcefile_field").val("");
						if(stop != -1)
							$("#upload_message").html("Filename: "+filename+" uploaded successfully. "+cont_msg);
						else
							$("#upload_message").html("Please upload a file below:");
					}
				}
			},
			error: function (data, status, e)
			{
				$("#upload_message").html('<span class="error">'+e+'</span>');
			}
		}
	)

	$(window).bind("beforeunload", function() { 
		if(upload_status)	return false;
	});

	return false;

}