jQuery load language

//index.html
<select id="select_language">
<option value="en">en</option>
<option value="ar">ar</option>
</select>

<form id="submit_from">
</form>

<span langstr="login_username"></span>
<span langstr="login_password"></span>

//page1.html
<input name="upload" type="file"></input>
<span langstr="mainmenu_status"></span>



//jquery
$("#submit_from").load("page1.html",function(){
load_language("lang_ar.js");
});
function load_language(url){
$.getScript(url,function(){
set_language();
});
}
function set_language(){
$("span").each(function(){
$(this).empty();
$(this).html(langstr[$(this).attr('langstr')]);

})
}