jQuery.popupWindow = function(instanceSettings)
{
	var defaultSettings = {
		centerBrowser:0, // center window over browser window? {1 (YES) or 0 (NO)}. overrides top and left
		centerScreen:0, // center window over entire screen? {1 (YES) or 0 (NO)}. overrides top and left
		height:500, // sets the height in pixels of the window.
		left:0, // left position when the window appears.
		location:0, // determines whether the address bar is displayed {1 (YES) or 0 (NO)}.
		menubar:0, // determines whether the menu bar is displayed {1 (YES) or 0 (NO)}.
		resizable:0, // whether the window can be resized {1 (YES) or 0 (NO)}. Can also be overloaded using resizable.
		scrollbars:0, // determines whether scrollbars appear on the window {1 (YES) or 0 (NO)}.
		status:0, // whether a status line appears at the bottom of the window {1 (YES) or 0 (NO)}.
		width:500, // sets the width in pixels of the window.
		windowName:null, // name of window set from the name attribute of the element that invokes the click
		windowURL:null, // url used for the popup
		top:0, // top position when the window appears.
		toolbar:0 // determines whether a toolbar (includes the forward and back buttons) is displayed {1 (YES) or 0 (NO)}.
	};
	
	var settings = $.extend({}, defaultSettings, instanceSettings || {});
	
	var windowFeatures =    'height=' + settings.height +
							',width=' + settings.width +
							',toolbar=' + settings.toolbar +
							',scrollbars=' + settings.scrollbars +
							',status=' + settings.status + 
							',resizable=' + settings.resizable +
							',location=' + settings.location +
							',menuBar=' + settings.menubar;

	settings.windowName = this.name || settings.windowName;
	settings.windowURL = this.href || settings.windowURL;
	var centeredY,centeredX;

	if(settings.centerBrowser){
		if ($.browser.msie) {//hacked together for IE browsers
			centeredY = (window.screenTop - 120) + ((((document.documentElement.clientHeight + 120)/2) - (settings.height/2)));
			centeredX = window.screenLeft + ((((document.body.offsetWidth + 20)/2) - (settings.width/2)));
		}else{
			centeredY = window.screenY + (((window.outerHeight/2) - (settings.height/2)));
			centeredX = window.screenX + (((window.outerWidth/2) - (settings.width/2)));
		}
		window.open(settings.windowURL, settings.windowName, windowFeatures+',left=' + centeredX +',top=' + centeredY).focus();
	}else if(settings.centerScreen){
		centeredY = (screen.height - settings.height)/2;
		centeredX = (screen.width - settings.width)/2;
		window.open(settings.windowURL, settings.windowName, windowFeatures+',left=' + centeredX +',top=' + centeredY).focus();
	}else{
		window.open(settings.windowURL, settings.windowName, windowFeatures+',left=' + settings.left +',top=' + settings.top).focus();	
	}
};