$scope.ev_click = function(obj){
    var ev = document.createEvent("MouseEvents");
    ev.initMouseEvent("click",true,false,window,null);
    obj.dispatchEvent(ev);
}

$scope.export_add = function(name,data){
    var urlObject = window.URL || window.webkitURL || window;
    var export_blob = new Blob([data],{type: "Multipart/form-data"});
    var save_link = document.createElementNS("http://www.w3.org/1999/xhtml","a")
    save_link.href = urlObject.createObjectURL(export_blob);
    save_link.download = name;
    $scope.ev_click(save_link);
}