function show(field) {
	for(i=0; i<field.length; i++) {
		if(field[i].checked) return field[i].value;
	}
}

function make_src(filename) {
    inf = document.getElementById('informer');
    src='';
	src += 'http://www.v2b.ru/export/'+filename+'.php?source=';
	src += inf['source'].value;

	if (inf['showheader'].checked) {
		src += '&showheader=yes';
	}

	if ((inf['showdate'].checked) && (!inf['showdate'].disabled)) {
		src += '&showdate=yes';
	}

 	src += '&limit=';
	src += show(inf['limit']);
	return src;
}

function show_code () {
	code = '<div><script language="JavaScript" src="';
	src = make_src('rss');
	code += src;
 	code += '"><\/script><\/div>';
	document.forms['example'].script.value = code;
}

function open_preview() {
	show_code();
	preview = window.open(make_src('rss_preview'), "_blank", "directories=no, width=500px, height=300px, location=no, menubar=no, scrollbars=no, status=no, toolbar=no");
}

function showdateVis(sel) {
	if (sel.options[sel.selectedIndex].value == 'v2bnews') {
		document.getElementById('rssdate').style.visibility = 'visible';
		document.getElementById('informer')['showdate'].disabled = false;
	}
	else {
		document.getElementById('rssdate').style.visibility = 'hidden';
		document.getElementById('informer')['showdate'].disabled = true;
	}
}