Uploading with progress example

var p=$('<progress max="100" value="0"><span class="value">0</span>%</progress>');
$.ajax({url:$('form').attr('action'), type:'POST', xhr:function(){
    var myXhr = $.ajaxSettings.xhr();
    if(myXhr.upload){
        myXhr.upload.addEventListener('progress',function(e){
            if(e.lengthComputable){
                p.attr({value:e.loaded,max:e.total});
                p.find('span').text(Math.floor(100*e.loaded/e.total));
            }
        }, false);
    }
    return myXhr;
}, success:function(z){
}, error:function(){
}, data:{}, cache:false, contentType:false, processData:false});
$('#progress').append(p);