$(document).ready(function(){
 
        // set all input.focus default value according to alt attribute
        $(".focus").each(function(){
          $(this).val($(this).attr("value"));
        });
 
        // clear input.focus on focus, if still in default
        $(".focus").focus(function() {
 
          if($(this).val()==$(this).attr("value")) {
            $(this).val("");
          }
        });
 
        // if field is empty afterward, add text again
        $(".focus").blur(function() {
          if($(this).val()=="") {
            $(this).val($(this).attr("value"));
          }
        });
 
      });