var isloggedin=0;

function loginDivert(title1, link1, link2)
  {
  if(isloggedin == 0)
     {
     // not logged in
     window.location.href = 'http://www.yosims.com/'+link2;
     }
  else
     {
     window.location.href = 'http://www.yosims.com/'+link1;
     }
  }
  
function doGB(title1, link1)
  {
  GB_showPage(title1, 'http://www.yosims.com/'+link1);
  }
  
function dogobackGB()
  {
  parent.parent.GB_hide();
  }

function checklogin()
{
var loginhtml;
var cookietext;

cookietext = readCookie('userlogin');

if (cookietext == null)
  {
  isloggedin = 0;
  loginhtml="<a href='http://www.yosims.com/login.php' title='YoSims - Login' rel='gb_page_center[500, 500]' class=topnav title=\"Login\">Login</a> | ";
  loginhtml= loginhtml+"<a href='http://www.yosims.com/register.php' title='YoSims - Register' class=topnav title=\"Register\">Register</a><br />";
  }
else
  {
  isloggedin = 1;
  eraseCookie('userlogin');
  createCookie('userlogin',cookietext,30);
  loginhtml= "<a href='http://www.yosims.com/personal_page.php' class=topnav title=\"Personal Page\">"+cookietext+"'s Personal Page</a> | <a href=\"javascript: dologout()\" class=topnav >Logout</a>";
  }
  return loginhtml;
}
  
function dologout()
  {
  isloggedin = 0;
  eraseCookie('userlogin');
  loginhtml="<a href='http://www.yosims.com/login.php' title='YoSims - Login' rel='gb_page_center[500, 500]' class=topnav title=\"Login\">Login</a> | ";
  loginhtml= loginhtml+"<a href='http://www.yosims.com/register.php' title='YoSims - Register' class=topnav title=\"Register\">Register</a><br />";
  window.document.getElementById('loginarea').innerHTML=loginhtml;
  }
  
  
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 = "";
	top.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 stc()
{
createCookie('test','test',30);
}