/*
----------------------------------------
file: util.js
app: merchantconnect
date: august 2008
desc: application-wide utility variables & functions
----------------------------------------
*/


var w3cdom = document.createElement && document.getElementsByTagName;


// cross-browser add event
//  ----------------------------------------------------------------------------------------------------
function addEvent(obj, evt, fn)
{
   if(obj.addEventListener)
   {
      obj.addEventListener(evt, fn, false);
   }
   else if(obj.attachEvent)
   {
      obj.attachEvent('on' + evt, fn);
   }
}


// write cookie
// ----------------------------------------------------------------------------------------------------
function writeCookie(name, value, days)
{
	if(days)
   {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		var expires = "; expires=" + date.toGMTString();
	}
	else var expires = "";
	document.cookie = name + "=" + value + expires + "; path=/";
}


// read cookie
// ----------------------------------------------------------------------------------------------------
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;
}


// erase cookie
// ----------------------------------------------------------------------------------------------------
function eraseCookie(name)
{
	writeCookie(name, "", -1);
}