var done = false, row_no = false;

if (document.getElementById)
{
	function geid(obj)
	{
		return document.getElementById(obj);
	}
}
else if (document.all)
{
	function geid(obj)
	{
		return document.all[obj];
	}
}

function toggle_visibility()
{
	var i, v,a=toggle_visibility.arguments;


	for(i=0;i<a.length;i++)
	{
		v = geid(a[i]).style;

		if (v.display == "block")
		{
			v.display = "none";
		}
		else
		{
			v.display = "block";
		}
	}
}

function show()
{
	var i, v,a=show.arguments;

	for(i=0;i<a.length;i++)
	{
		v = geid(a[i]).style;

		if (v.display != "block")
		{
			v.display = "block"
		}
	}
}

function hide()
{
	var i, v,a=hide.arguments;

	for(i=0;i<a.length;i++)
	{
		v = geid(a[i]).style;

		if (v.display != "none")
		{
			v.display = "none"
		}
	}
}

function init()
{
	// Begin by finding cool tables
	var obj = document.getElementsByTagName("table");

	for (var i=0;i<obj.length;i++)
	{
		if (obj[i].className.indexOf("special") != -1)
		{
			// obj is a cool table, so must make the rollovers
			tobj = obj[i].childNodes;

			if ((tobj[0].tagName.toLowerCase() == "colgroup") && (tobj[tobj.length-1].tagName.toLowerCase() == "tbody"))
			{
				tobj = tobj[tobj.length-1].childNodes;
			}
			else if (tobj[0].tagName.toLowerCase() == "tbody")
			{
				tobj = tobj[0].childNodes;
			}
			
			for (var j=0;j<tobj.length;j++)
			{
				if ((tobj[j].className.indexOf("info") == -1) && (tobj[j].className.indexOf("tableheader") == -1))
				{
					tobj[j].onclick = rollsel;
				}
			}
		}
		else if (obj[i].className.indexOf("grid") != -1)
		{
			// obj is a cool table, so must make the rollovers
			tobj = obj[i].childNodes;

			if ((tobj[0].tagName.toLowerCase() == "colgroup") && (tobj[tobj.length-1].tagName.toLowerCase() == "tbody"))
			{
				tobj = tobj[tobj.length-1].childNodes;
			}
			else if (tobj[0].tagName.toLowerCase() == "tbody")
			{
				tobj = tobj[0].childNodes;
			}
			
			for (var j=0;j<tobj.length;j++)
			{
				if ((tobj[j].className.indexOf("info") == -1) && (tobj[j].className.indexOf("tableheader") == -1))
				{
					tobj[j].onmouseover = rollongrid;
					tobj[j].onmouseout = rolloffgrid;
					tobj[j].onclick = rollselgrid;
				}
			}
		}
	}
}

function rollongrid(e)
{
	e = (e)?e:window.event;
	var obj = (e.target)?e.target:e.srcElement;

	while ((obj.tagName.toLowerCase() != "td") || (obj.className.toLowerCase() != "grid"))
	{
		obj = obj.parentNode;
	}
	obj = obj.parentNode;

	if (obj.className != "selected")
	{
		obj.className = "rollover";
	}
}

function rolloffgrid(e)
{
	e = (e)?e:window.event;
	var obj = (e.target)?e.target:e.srcElement;

	while ((obj.tagName.toLowerCase() != "tr") || (obj.className.toLowerCase() != "rollover"))
	{
		obj = obj.parentNode;
	}

	if (obj.className != "selected")
	{
		obj.className = "grid";
	}
}

function rollselgrid(e)
{
	e = (e)?e:window.event;
	var obj = (e.target)?e.target:e.srcElement;

	while ((obj.tagName.toLowerCase() != "td") || (obj.className.toLowerCase() != "grid"))
	{
		obj = obj.parentNode;
	}
	obj = obj.parentNode;

	if (obj.className != "selected")
	{
		obj.className = "selected";
	}
	else
	{
		obj.className = "rollover";
	}
}

function rolloncell(e)
{
	e = (e)?e:window.event;
	var obj = (e.target)?e.target:e.srcElement;

	while (obj.tagName.toLowerCase() != "td")
	{
		obj = obj.parentNode;
	}

	if (obj.className != "selected")
	{
		obj.style.backgroundColor = "#C0C0C0";
	}
}

function rolloffcell(e)
{
	e = (e)?e:window.event;
	var obj = (e.target)?e.target:e.srcElement;

	while (obj.tagName.toLowerCase() != "td")
	{
		obj = obj.parentNode;
	}

	if (obj.className != "selected")
	{
		obj.style.backgroundColor = "#FFFFFF";
	}
}

function rollsel(e)
{
	e = (e)?e:window.event;
	var obj = (e.target)?e.target:e.srcElement;

	while (obj.tagName.toLowerCase() != "tr")
	{
		obj = obj.parentNode;
	}

	if (obj.className != "selected")
	{
//		obj.style.background = "";
		obj.className = "selected";
	}
	else
	{
		obj.className = "";
	}
}

var scroller, curpos, scrollto, scrollheight;

function initscroll()
{
	var holder = geid("scrollnews");
	holder.style.position = "relative";
	holder.style.height = "150px";
	holder.style.overflow = "hidden";

	scroller = holder.childNodes[0];
	scroller.style.position = "absolute";
	scroller.style.top = curpos = 150;
	scrollheight = scroller.offsetHeight;
	scroller.style.height = "150px";

	startscroll();
}

function stopscroll()
{
	clearTimeout(scrollto);
	scrollto = 0;
}

function startscroll()
{
	if (!scrollto)
	{
		scrollto = setTimeout("startscroll()", 50);
		return;
	}
	
	if (curpos <= scrollheight*(-1))
	{
		curpos = 150;
		scroller.style.height = "150px";
	}
	curpos -= 1;
	scroller.style.top = (curpos)+"px";
	if (curpos >= 0)
	{
		scroller.style.height = ((curpos*(-1))+150+5)+"px";
	}
	
	scrollto = setTimeout("startscroll()", 100);
}

function homepage_selection(obj)
{
	var number = geid("homepage_selection").childNodes.length;

	for (var i=0;i<number;i++)
	{
		if (obj == i)
		{
			geid("homepage_selection").childNodes[i].className = "selected";
			document.getElementById("homepage_selection"+i).style.display = "block";
			continue;
		}
		
		if (geid("homepage_selection").childNodes[i].className == "selected")
		{
			geid("homepage_selection").childNodes[i].className = "";
			document.getElementById("homepage_selection"+i).style.display = "none";
		}
	}
}
	
function interactive_track(obj, def)
{
	var n = 't_' + obj.id.substr(2);
	var c = (obj.checked)?1:0;
	
	document.getElementById(n).style.display = ((def+c)%2)?"block":"none";
}

function validate_blog_comment()
{
	if (!document.getElementsByName('blog_comment[author]')[0].value.length)
	{
		alert("You need to specify a nickname");
		document.getElementsByName('blog_comment[author]')[0].focus();
		return false;
	}

	if (document.getElementsByName('blog_comment[email]').length && !document.getElementsByName('blog_comment[email]')[0].value.match(/^[a-zA-Z0-9_\.\-\+]+@([a-zA-Z0-9\-]+\.)+([a-zA-Z0-9]{2,4})+$/))
	{
		alert("You need to specify a valid e-mail address\n\n(required to validate your post, but will not be published - see privacy policy for more details)");
		document.getElementsByName('blog_comment[email]')[0].focus();
		return false;
	}
	
	if (!document.getElementsByName('blog_comment[text]')[0].value.length)
	{
		alert("You need to enter your comment");
		document.getElementsByName('blog_comment[text]')[0].focus();
		return false;
	}
	return true;
}