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

	// open links to downloadable files or other sites in a new window
	Array.prototype.f_contains = function(s) {
		for (var i = 0; i < this.length; i++) {
			if (this[i] == s) return true;
		}
		return false;
	}

	// known extensions for downloadable files
	var exts = ['png', 'jpg', 'jpeg', 'gif', 'pdf', 'doc', 'xls', 'ppt', 'zip', 'gz', 'mpg', 'mpeg', 'mov', 'mp4', 'avi', 'wmv', 'mp3', 'wav', 'swf', 'bmp', 'tif', 'tiff', 'svg'];

	var links = document.getElementsByTagName('a');

	for (var i = 0; i < links.length; i++) {
		var link  = links[i];

		// find extension
		var split_slash = link.href.split('/');
		var split_ext   = split_slash[split_slash.length - 1].split('.');
		var ext = split_ext[split_ext.length - 1];

		// check if extension indicates a downloadable file
		if (split_ext.length > 1) {
			if (exts.f_contains(ext)) {
				links[i].target = '_blank';
			}
		}

		// look for links to other sites
		if (link.href.substring(0, 7) == 'http://') {
			if (link.href.substring(7, 7 + window.location.hostname.length) != window.location.hostname) {
				links[i].target = '_blank';
			}
		}
	}

	// known extensions for shadowbox media files
	var s_exts = ['jpg', 'jpeg', 'png', 'gif', 'flv'];

	var s_links = document.getElementsByTagName('a');

	for (var j = 0; j < s_links.length; j++) {
		var s_link  = s_links[j];

		// find extension
		var s_split_slash = s_link.href.split('/');
		var s_split_ext   = s_split_slash[s_split_slash.length - 1].split('.');
		var s_ext = s_split_ext[s_split_ext.length - 1];

		// check if extension indicates a media file
		if (s_split_ext.length > 1) {
			if (s_exts.f_contains(s_ext)) {
				s_links[j].rel = 'shadowbox[all]';
			}
		}
	}

	// Shadowbox options
	var options = {
		flvPlayer:         '/swf/lib/shadowbox/flvplayer.swf'
	};

	Shadowbox.init(options);
	
	// header search form
	var headerSearch = $('header_search');
	var headerSearchQuery = $('header_search_query');

	// remove default text when the cursor enters the search box
	headerSearchQuery.addEvent('focus', function() {
		if (this.value == this.defaultValue) {
			this.value = '';
		}
	});

	// restore default text when the cursor leaves the search box (only when it's empty)
	headerSearchQuery.addEvent('blur', function() {
		if (this.value == '') { 
			this.value = this.defaultValue;
		}
	});

	// do not submit the form when the user did not enter a search query
	headerSearch.addEvent('submit', function() {
		var headerSearchQuery = $('header_search_query');
		if (headerSearchQuery.value == '' || headerSearchQuery.value == headerSearchQuery.defaultValue) return false;
	});

	// header select navigation
	var headerSelectnav = $('header_selectnav');
	var headerSelectnavSelect = $('header_selectnav_select');

	// jump to selected item's URL
	headerSelectnavSelect.addEvent('change', function() {
		var selected_URL = this.options[this.selectedIndex].value;
		if (selected_URL != '') { 
			window.location = selected_URL;
		}
	});

	// do not submit the form when the user did not select an item
	headerSelectnav.addEvent('submit', function() {
		var headerSelectnavSelect = $('header_selectnav_select');
		if (headerSelectnavSelect.options[headerSelectnavSelect.selectedIndex].value == '') return false;
	});
});