<input type="text" title="Username" /> <br />
<input type="text" title="Password" /> <br />
<input type="text" title="Age" /> <br />

//This is the smart way to title attribute value to value of textbox
$("input[type=text]").val(function() {
      return $(this).attr("title");
});

//Otherwise using $.each in Jquery
$.each($("input[type=text]"),function(){
         $(this).val($(this).attr("title"));
         $(this).addClass("font_dimmer");
});