// write a select input box
function write_select() {

	var sel = arguments[0];
	var i;
	var n;
	var v;
	var sel_tag;

	for(i = 1; i < arguments.length; i += 2) {
		v = arguments[i];
		n = arguments[i + 1];
		sel_tag = (sel == v) ? " selected" : "";
		document.writeln('<option value="' + v + '"'
							+ sel_tag + '>' + n + '</option>');
	}
}

// get a currency symbol
function get_ccy_symbol (code) {

	switch(code) {
		case "GBP": { return "\u00A3"; }
		case "EUR": { return "\u20AC"; }
		case "USD": { return "$"; }
		default:    { return code + " "; }
	}
}

// get a cookie
function get_cookie(name) {

	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);

	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) {
			return null;
		}
	}
	else {
		begin += 2;
	}

	var end = document.cookie.indexOf(";", begin);
	if (end == -1) {
		end = dc.length;
	}

	return unescape(dc.substring(begin + prefix.length, end));
}



// set a cookie
function set_cookie(name, value, expires, path, domain, secure) {

	var curCookie = name + "=" + value +
		((expires) ? "; expires=" + expires.toGMTString() : "") +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "") +
		((secure) ? "; secure" : "");

	document.cookie = curCookie;
}

// trim a string
function str_trim(src, delim) {

	var r = "";
	var b = "";
	var skipsp = false;

	for(var i = 0; i < src.length; i++) {
		var c = src.charAt(i);
		if (delim.indexOf(c) >= 0) {
			b += c;
		}
		else {
			if (r.length > 0) {
				r += b;
			}
			b = "";
			r += c;
		}
	}

	return r;
}