// surcharge.js

window.addEvent('domready', function(clearDefault) {

  			// if field has default text ( "Search" ) - change to blank 
			$('zipcode').addEvent('focus', function(){
				if( $('zipcode').getProperty( 'value' ) == 'Zip Code' ) {
					$('zipcode').setProperty( 'value', '' );	
				}
			});

			// if field has been modified, don't swap back to "Search" on blur
			$('zipcode').addEvent('blur', function(){
				if( $('zipcode').getProperty( 'value' ) == '' ) {
					$('zipcode').setProperty( 'value', 'Zip Code' );
				}				
			});	
	

});