/**
 * searchFocus and searchBlur govern the behavior of the search box in
 * the masthead of every page
 */
function searchFocus(){
	var search_box 		= document.getElementById('search_box');
	var search_string 	= search_box.value;
	var default_message = 'Search our plant database';
	
	//clear the default message
	if(search_string == default_message){
		search_box.value 		= '';
		search_box.style.color 	= 'black';
	}
}

function searchBlur(){
	var search_box 		= document.getElementById('search_box');
	var search_string 	= search_box.value;
	var default_message = 'Search our plant database';
	
	//restore the default message
	if(search_string == ''){
		search_box.style.color 	= 'gray';
		search_box.value		= default_message;
	}
}


/**
 * Shows or hides the advanced search fields on the product page
 */
function showHideAdvancedSearch(){
	var link		= document.getElementById('show_hide_advanced_search');
	var fieldset	= document.getElementById('advanced_search');
	if(link.innerHTML == 'Show Advanced Search'){
		link.innerHTML = 'Hide Advanced Search';
		fieldset.style.display = 'block';
	} else {
		link.innerHTML = 'Show Advanced Search';
		fieldset.style.display = 'none';
	}
}