// 
var is_regexp = (window.RegExp) ? true : false;


function fetch_object(idname)
{
	if (document.getElementById)
	{
		return document.getElementById(idname);
	}
	else if (document.all)
	{
		return document.all[idname];
	}
	else if (document.layers)
	{
		return document.layers[idname];
	}
	else
	{
		return null;
	}
}




function toggle_effect(objid)
{
	if (!is_regexp)
	{
		return false;
	}

	obj = fetch_object('collapseobj_' + objid);
	img = fetch_object('collapseimg_' + objid);
	cel = fetch_object('collapsecel_' + objid);

	if (!obj)
	{
		// nothing to collapse!
		if (img)
		{
			// hide the clicky image if there is one
			img.style.display = 'none';
		}
		return false;
	}

	if (obj.style.display == 'none')
	{
		$(obj).show("slow");
		save_collapsed(objid, false);
		if (img)
		{
			img_re = new RegExp("_collapsed\\.gif$");
			img.src = img.src.replace(img_re, '.gif');
		}
		if (cel)
		{
			cel_re = new RegExp("^(thead|tcat)(_collapsed)$");
			cel.className = cel.className.replace(cel_re, '$1');
		}
	}
	else
	{
		$(obj).hide("slow");
		save_collapsed(objid, true);
		if (img)
		{
			img_re = new RegExp("\\.gif$");
			img.src = img.src.replace(img_re, '_collapsed.gif');
		}
		if (cel)
		{
			cel_re = new RegExp("^(thead|tcat)$");
			cel.className = cel.className.replace(cel_re, '$1_collapsed');
		}
		ad = fetch_object('ad_welcomerectangle');
		if (ad)
		{
			ad.style.display = 'none';
		}
	}
	return false;
}
function save_collapsed(objid, addcollapsed)
{
	var collapsed = fetch_cookie('vbulletin_collapse');
	var tmp = new Array();

	if (collapsed != null)
	{
		collapsed = collapsed.split('\n');

		for (var i in collapsed)
		{
			if (collapsed[i] != objid && collapsed[i] != '')
			{
				tmp[tmp.length] = collapsed[i];
			}
		}
	}

	if (addcollapsed)
	{
		tmp[tmp.length] = objid;
	}

	expires = new Date();
	expires.setTime(expires.getTime() + (1000 * 86400 * 365));
	set_cookie('vbulletin_collapse', tmp.join('\n'), expires);
}


function set_cookie(name,value,expires)
{document.cookie=name+'='+escape(value)+'; path=/'+(typeof expires!='undefined'?'; expires='+expires.toGMTString():'');}
function delete_cookie(name)
{document.cookie=name+'='+'; expires=Thu, 01-Jan-70 00:00:01 GMT'+'; path=/';}
function fetch_cookie(name)
{cookie_name=name+'=';cookie_length=document.cookie.length;cookie_begin=0;while(cookie_begin<cookie_length)
{value_begin=cookie_begin+cookie_name.length;if(document.cookie.substring(cookie_begin,value_begin)==cookie_name)
{var value_end=document.cookie.indexOf(';',value_begin);if(value_end==-1)
{value_end=cookie_length;}
return unescape(document.cookie.substring(value_begin,value_end));}
cookie_begin=document.cookie.indexOf(' ',cookie_begin)+1;if(cookie_begin==0)
{break;}}
return null;}