function setCookie(c_name,value,expiredays)
{
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+ ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}
function getCookie(c_name)
{
	if (document.cookie.length>0)
	{
		c_start=document.cookie.indexOf(c_name + "=");
		if (c_start!=-1)
		{
			c_start=c_start + c_name.length+1; 
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) c_end=document.cookie.length;
			return unescape(document.cookie.substring(c_start,c_end));
    	} 
	}
	return "";
}
function checkHeader(divName)
{
	var cookievar = getCookie('gromada_headergroep'); // naam van de cookie
	
	if (cookievar!=null && cookievar!="")
	{
		loadHeader('normal',divName);
	}
	else 
	{
		setCookie('gromada_headergroep','cookie4header',1);
		loadHeader('start',divName);
	}
}
function loadHeader(mode,layer)
{
	var moviename = '';
	if (mode == 'start')
	{
		moviename = 'gromada_header_groep'; // naam van intro movie hier, zonder .swf
	}
	else
	{
		moviename = 'gromada_header_groep_nosound'; // naam van slogan movie hier, zonder .swf
	}
	var content = '';
	content = content + ('<object width="830" height="280">');
	content = content + ('<param name="movie" value="'+moviename+'">');
	content = content + ('<embed src="/images/'+moviename+'.swf" width="830" height="280"></embed>');
	content = content + ('</object>');
						
	document.getElementById(layer).innerHTML = content;
}