/*
 * Se un box e visibile (display:block), nascondilo (display:none)
 * altrimenti (! cioe' se e' 'none' o qualcosa d'altro!)
 * mostralo (display:block)
 */

function showHideBox(boxName) {

 	var boxDisplay;
 	if (document.getElementById) {
 		boxDisplay = document.getElementById(boxName).style;
 	} else if (document.all) {
 		boxDisplay = document.all[boxName].style;
 	} else if (document.layers) {
 		boxDisplay = document.layers[boxName].style;
 	}
 	
 	if(boxDisplay.display=='block') {
 		boxDisplay.display = 'none';
 	} else {
 		boxDisplay.display = 'block';
 	}
 	
}

/*
 * Cookie functions.
 * Thanks to Peter-Paul Koch. www.quirksmode.org
 */
function createCookie(name,value,mins) {
	if (mins) {
		var date = new Date();
		date.setTime(date.getTime()+(mins*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

function showSpecial() {
	
	var specialName='special-container';

	if(document.getElementById(specialName)) {
	
		if(!readCookie('rdbspecialhome')) {
			createCookie('rdbspecialhome','isread');
			showHideBox(specialName);
		}
	
	}
}

function addEvent(obj, evType, fn){ 

	if (obj.addEventListener){ 
	  	obj.addEventListener(evType, fn, false); 
	  	return true; 
	} else if (obj.attachEvent){ 
	  	var r = obj.attachEvent("on"+evType, fn); 
	  	return r; 
	} else { 
	  	return false; 
	} 
}

addEvent(window,'load',showSpecial);