function addEventSimple( obj, evt, fn )
{
	if( obj.addEventListener )
		obj.addEventListener( evt, fn, false );
	else if( obj.attachEvent )
		obj.attachEvent( 'on'+evt, fn );
}

function colorRowsIn( cname, even, odd )
{
	var tables = document.getElementsByTagName('TABLE');
	for( var t = 0; t < tables.length; t++ )
	{
		if( tables[t].className != cname )
			continue;

		var rows = tables[t].rows;
		var isOddCounter = 1;
				
		for( var i = 0; i < rows.length; i++ )
		{
			if( isOddCounter == 1 )
				rows[i].className = odd;
			else
				rows[i].className = even;

			isOddCounter *= -1;
		}
	}
}

function getStyle( el, styleProp )
{
	var y = undefined;

	if( el.currentStyle )
	{
		y = el.currentStyle[styleProp];
	}
	else if( window.getComputedStyle )
	{
		y = document.defaultView.getComputedStyle( el,null ).getPropertyValue( styleProp );
	}
	
	return y;
}

/**
 * Sets a Cookie with the given name and value.
 *
 * name       Name of the cookie
 * value      Value of the cookie
 * [expires]  Expiration date of the cookie (default: end of current session)
 * [path]     Path where the cookie is valid (default: path of calling document)
 * [domain]   Domain where the cookie is valid
 *              (default: domain of calling document)
 * [secure]   Boolean value indicating if the cookie transmission requires a
 *              secure transmission
 */
function setCookie( name, value, expires, path, domain, secure )
{
	document.cookie = name + "=" + escape( value ) +
		((expires) ? "; expires=" + expires.toGMTString() : "") +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "") +
		((secure) ? "; secure" : "");
}

/**
 * Gets the value of the specified cookie.
 *
 * name  Name of the desired cookie.
 *
 * Returns a string containing value of specified cookie,
 *   or null if cookie does not exist.
 */
function getCookie( 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 ) );
}

/**
 * Deletes the specified cookie.
 *
 * name      name of the cookie
 * [path]    path of the cookie (must be same as path used to create cookie)
 * [domain]  domain of the cookie (must be same as domain used to create cookie)
 */
function deleteCookie( name, path, domain )
{
	if( getCookie( name ) )
	{
		document.cookie = name + "=" + 
			((path) ? "; path=" + path : "") +
			((domain) ? "; domain=" + domain : "") +
			"; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}

function gid( identificator )
{
	return document.getElementById( identificator );
}