// Set a message in search box.
//
// Usage:
//
// new Fb20MsgSearchBox('my message');
//
var Fb20MsgSearchBox = Class.create({
   initialize: function(message) {
       if ($('main_search')) {
           if (!message) { message = '' }
           this.message = message;
           this.search_box = $('main_search').down('input');
           this.setMessage();
           this.search_box.observe('focus', this.setOnFocus.bind(this));
           this.search_box.observe('blur', this.setMessage.bind(this));
       }
   },
   setOnFocus: function(event) {
       if (this.search_box.value == this.message) { this.search_box.value = '' }
   },
   setMessage: function() {
       if (this.search_box.value == '') { this.search_box.value = this.message; }
   }
});