function popup(url,name,width,height,wplus,hplus,focus,left,top,menubar,status,toolbar,scrollbar,resizable,scrx,scry,directories,loc) {
	if ( !url ) return false;
	if ( !name ) name = 'popupWin';
	if ( !width ) width = '';
	if ( !height ) height = '';
	if ( !directories ) directories = 'no';
	if ( !loc ) loc = 'no';
	if ( !menubar ) menubar = 'no';
	if ( !status ) status = 'no';
	if ( !toolbar ) toolbar = 'no';
	if ( !scrollbar ) scrollbar = 'no';
	if ( !resizable ) resizable = 'no';
	if ( !scrx ) scrx = '100';
	if ( !scry ) scry = '100';
	if ( !left ) left = '100';
	if ( !top ) top = '100';
	if ( wplus ) width  += wplus;
	if ( hplus ) height += hplus;

    var popupWin = window.open(url,name,'width='+width+'px,height='+height+'px,left='+left+',top='+top+',menubar='+menubar+',status='+status+',toolbar='+toolbar+',scrollbars='+scrollbar+',resizable='+resizable+',screenX='+scrx+',screenY='+scry+'directories='+directories+',location='+loc);

	if ( focus ) popupWin.focus();
}

function imagePreloader( src ) {
    var img_pre = new Image();
    img_pre.src = src;
}

function $( name ) {
	if (typeof name == 'string')
		return document.getElementById(name);

	return name;
}

var rules = 1;
function toggle( num ) {
    $('rules_'+rules).style.display = 'none';
    $('rules_'+num).style.display = 'block';

	$('a'+rules).style.fontWeight = 'normal';
    $('a'+num).style.fontWeight = 'bold'

    rules = num;
}