window.size = function()
{
	var w = 0;
	var h = 0;

	//IE
	if(!window.innerWidth)
	{
		//strict mode
		if(!(document.documentElement.clientWidth == 0))
		{
			w = document.documentElement.clientWidth;
			h = document.documentElement.clientHeight;
		}
		//quirks mode
		else
		{
			w = document.body.clientWidth;
			h = document.body.clientHeight;
		}
	}
	//w3c
	else
	{
		w = window.innerWidth;
		h = window.innerHeight;
	}
	return {width:w,height:h};
}

window.center = function()
{
	var hWnd = (arguments[0] != null) ? arguments[0] : {width:0,height:0};

	var _x = 0;
	var _y = 0;
	var offsetX = 0;
	var offsetY = 0;

	//IE
	if(!window.pageYOffset)
	{
		//strict mode
		if(!(document.documentElement.scrollTop == 0))
		{
			offsetY = document.documentElement.scrollTop;
			offsetX = document.documentElement.scrollLeft;
		}
		//quirks mode
		else
		{
			offsetY = document.body.scrollTop;
			offsetX = document.body.scrollLeft;
		}
	}
	//w3c
	else
	{
		offsetX = window.pageXOffset;
		offsetY = window.pageYOffset;
	}

	_x = ((this.size().width-hWnd.width)/2)+offsetX;
	_y = ((this.size().height-hWnd.height)/2)+offsetY;

	return{x:_x,y:_y};
}

function showCenter(point)
{
	var div = document.createElement("div");
	div.style.background = "#dedede";
	div.style.position = "absolute";
	div.style.top = point.y + "px";
	div.style.left = point.x + "px";
	div.style.width = "180px";
	div.style.height = "45px";
	div.style.padding = "10px";
	div.style.border = "1px solid #000";
	div.innerHTML = '<p><table><tr><td><img src="/media/images/loader.gif" height="32" width="32" /></td><td>Loading, please wait</td></tr></table></p>';
	document.body.appendChild(div);
}


function wait_for(url){
	showCenter(window.center({width:180,height:45}))
	document.location=url;
}