function esconde_anuncio(divId) {
	if (document.layers) document.layers[divId].visibility = 'hide';
	else if (document.all) document.all[divId].style.visibility = 'hidden';
	else if (document.getElementById) document.getElementById(divId).style.visibility = 'hidden';
}

function mostrar_anuncio(divId) {	
	state=typeof topPos;
	if(state=='undefined') topPos=-260;
	if(topPos < 75) { 
		topPos+=3;
		if (document.layers) document.layers[divId].top = topPos;
		else if (document.all) document.all[divId].style.top = topPos;
		else if (document.getElementById) document.getElementById(divId).style.top = topPos;
		setTimeout("mostrar_anuncio('pop');",25);
	}
}

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 eraseCookie(name) {
	setCookie(name,"",-1);
	alert(document.cookie);
}