var forcus_color = '#000000';
var unforcus_color = '#999999';
var default_value = '¸¡º÷¥ï¡¼¥É';

function setSearchValue() {
	$('search_value').style.color = unforcus_color;
	$('search_value').value = default_value;
}
function removeSearchValue() {
	$('search_value').value = '';
	$('search_value').style.color = forcus_color;
}

addEvent( 'domready', function() {
	if ( $('search_value').value == '' ) {
		setSearchValue();
	}
	$('search_value').addEvent('focus', function () {
		if ( $('search_value').value == default_value) {
			removeSearchValue();
		}
		$('search_value').style.backgroundColor = '#FFFFAA';
	});
	$('search_value').addEvent('blur', function () {
		if ( $('search_value').value == '') {
			setSearchValue();
		}
		$('search_value').style.backgroundColor = '#FFFFFF';
	});
} );