disp-current-user

var currentuser = $().SPServices.SPGetCurrentUser();

var lcid = _spPageContextInfo.currentLanguage;
var pp_str;
var img_str;

if (lcid == "1041") {
    pp_str = "ユーザー選択ウィンドウ";
    img_str = "名前の確認";
} else {
    pp_str = "People Picker";
    img_str = "Check Names";
};

var columnName = 'Requestor Name';
var searchText = RegExp("FieldName=\"" + columnName + "\"", "gi");

$("td.ms-formbody").each(function () {

    if (searchText.test($(this).html())) {
        $(this).find("div[Title=\'" + pp_str + "\']").html(currentuser);
        $(this).find("textarea[title=\'" + pp_str + "\']").val(currentuser);
        $(this).find("img[title=\'" + img_str + "\']").trigger("click");
    }

});