/* Copyright (c) 2008 Brandon Aaron (http://brandonaaron.net)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) 
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 *
 * $LastChangedDate$
 * $Rev$
 *
 * Version 0.1
 *
 * Usage: 
 *   $("input[name=q]")
 *      .val("Search")    // set an initial value if it doesn't already exist
 *      .clearonfocus();  // prepare the element for clearing on focus
 */

jQuery.fn.clearonfocus = function() {
        return this
                .bind('focus', function() {
                        // Set the default value if it isn't set
                        if ( !this.defaultValue ) this.defaultValue = this.value;
                        // Check to see if the value is different
                        if ( this.defaultValue && this.defaultValue != this.value ) return;
                        // It isn't, so remove the text from the input
                        this.value = '';
                })
                .bind('blur', function() {
                        // If the value is blank, return it to the defaultValue
                        if ( this.value.match(/^\s*$/) )
                                this.value = this.defaultValue;
                });
};