<!--https://www.jeasyui.com/forum/index.php?topic=7052.0 

-->
<form enctype="multipart/form-data" id="ff" name="ff" method="post">
    <table border="0" style="width:100%">
        <tr>
            <td><input id="fb" name="userfile[]" type="text" style="width: 100%;"></td>
            <td style="width: 90px; text-align: right;"><a id="btn-upload" href="javascript:void(0)">Subir</a></td>
        </tr>
</table>
</form>
<div id="multiusage"></div>

<script type="text/javascript">
$(function() {

    $('#fb').filebox({
        buttonText: 'Buscar...',
        multiple: true,
        icons:[{
            iconCls:'icon-clear',
            handler: function(e){
                $(e.data.target).filebox('clear');
            }
        }],
        onChange: function (newValue, oldValue) {
            if ($(this).textbox('getValue').length > 0 ) {
                $('#btn-upload').linkbutton('enable');
            }
            else { $('#btn-upload').linkbutton('disable'); }
        }
    });
    var inputfile = $('#fb').next().find('.textbox-value');
    $('#btn-upload').linkbutton({
        iconCls: 'icon-upload', disabled: true, plain: true,
        onClick: function() { upLoad(); }
    });
    
    // Function to execute on submit form
    function upLoad() {
        if ($('#fb').textbox('getValue').length === 0) {
            $.messager.alert('Message','Upload not possible.<br /><br />No file selected.','error');
            return false;
        }
        $('#ff').form('submit', {
            url: 'upload-backend.php',
            queryParams: { uploadpath: '/tmp/uploads' },
            iframe: false,
            onProgress: function (percent) {
                progressFile('update',percent);
            },
            onSubmit: function(param) {
                progressFile('show');
            },
            success: function(data) {
                $('ff').form('clear');
                setTimeout(function() {
                    submitReturn(data,function(data) { // nothing to exec on submit success                       
                    },
                    function(){ // nothing to exec on submit error
                    },false);
                },1000); }
        });
    }
    
    // Show modal ProgrssBar when uploading file
    function progressFile(method,val){
        var div_id='win-progress-file';
        var progress_id='progress-file';
        var htmlcontent = '<div id="'+progress_id+'" class="easyui-progressbar" style="width:100%;"></div>' +
            '<div style="margin-top: 10px; text-align: center; font-size: 1.3em; font-weight: bold;">Uploading files</div>';
        var op = method.toLowerCase();
        switch (op) {
            case 'show':
                $("#multiusage").append('<div id="'+div_id+'" style="padding: 20px;"></div>');
                $("#"+div_id).window({
                        title: 'Wait ...',
                        width: 300,
                        resizable: false, shadow: false,
                        minimizable: false, maximizable: false, collapsible:false, closable: false,
                        modal: true,
                        onClose: function (event, ui) {
                                $("#"+div_id).window('destroy');
                                $("#"+div_id).remove();
                        },
                        content: htmlcontent
                });
            break;
            case 'close':
                $("#"+div_id).window('close');
            break;
            case 'update':
                $("#"+progress_id).progressbar('setValue', val);
            break;

        }
    }

    //Manage form submit return message (you can optionally exec specified function on success and on error)
    function submitReturn(data,successCallback,errorCallback,showSavemsg) { 
        showSavemsg = typeof showSavemsg !== 'undefined' ? showSavemsg : true;
        $.messager.progress('close');
        progressFile('close');
        try {
            var data = $.parseJSON(data);
        } catch (e) {
    //        console.log(e);
            $.messager.alert('JavaScript Exception Error',data);
            errorCallback();
            return false;
        }
        if (data.error === true){
            $.messager.alert('Server Error',data.message,'error');
            errorCallback(data);
            return false;
        } else {
            if (showSavemsg) {
                $.messager.show({
                    title:'Message',
                    msg:'<span class="icon-ok"><img src="img/blank.gif" width="22" height="16"></span><span>Data successfully saved.</span>'
                });
            }
            successCallback(data);
        }
    }    
 
});
</script>