(function($){ 		  
    $.fn.popupWindow = function(instanceSettings){
		
        $.fn.popupWindow.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)}.
        };

        settings = $.extend({}, $.fn.popupWindow.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();
        }

        return false;
    };
})(jQuery);