jQuery.fn.labelOver = function(overClass) {
   return this.each(function(){
      var label = jQuery(this);
      var f = label.attr('for');
      if (f) {
         var input = jQuery('#' + f);
         
         this.hide = function() {
           label.css({ textIndent: -10000 })
         }
         
         this.show = function() {
           if (input.val() == '') label.css({ textIndent: 0 })
         }

         // handlers
         input.focus(this.hide);
         input.blur(this.show);
        label.addClass(overClass).click(function(){ input.focus() });
         
         if (input.val() != '') this.hide(); 
      }
   })
}