function shtab(i)
{
	var tab = $('#tab_'+i);

	tab.attr('class', 'slct');
	tab.attr('src', 'http://ptf.com/images/tab'+i+'_.gif');
	tab.attr('height', '41');

	if (i!=1)
		hide_shtab(1);
	if (i!=2)
		hide_shtab(2);
	if (i!=3)
		hide_shtab(3);
	if (i!=4)
		hide_shtab(4);

	$('#ibox_'+i).fadeIn();

	createCookie('shtab', i, 365);
}

function hide_shtab(i)
{
	var tab = $('#tab_'+i);

	$('#ibox_'+i).css("display","none");

	tab.attr('class', 'just_tab');
	tab.attr('src', 'http://ptf.com/images/tab'+i+'.gif');
	tab.attr('height', '40');
}

function set_shtab()
{
	var i=readCookie('shtab');
	if (i) shtab(i);
}

function createCookie(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=/; domain=.ptf.com";
//	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;
}