/* Original source: http://swip.codylindley.com/jquery.popupWindow.js */
/* Modified to support proportional height/width; changed default scrollbar and resizable behavior - Brian Rowland 11/16,21/2009 */
/* Added better IE support for proportional window size */

(function($){ 		  
	$.fn.popupWindow = function(instanceSettings){
		
		return this.each(function(){
		
		$(this).click(function(){
		
		$.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:1, // whether the window can be resized {1 (YES) or 0 (NO)}. Can also be overloaded using resizable.
			scrollbars:1, // 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 || {});
		
		/* is height proportional? */
		var tHeight = settings.height;
		if (tHeight.charAt(tHeight.length-1) === '%'){
			tHeight = parseInt(tHeight, 10);
			tHeight = tHeight * 0.01; /* we can live with the precision error here */
			settings.height = ((window.outerHeight || screen.availHeight) * (tHeight)).toString();
			}

		/* is width proportional? */
		var tWidth = settings.width;
		if (tWidth.charAt(tWidth.length-1) === '%'){
			tWidth = parseInt(tWidth, 10);
			tWidth = tWidth * 0.01; /* we can live with the precision error here */
			settings.width = ((window.outerWidth || screen.availWidth) * (tWidth)).toString();
			}

		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; /*BR NOTE: I don't know about this design approach - violates the HTML spec'*/
				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) - settings.height)/2);
						centeredX = window.screenLeft + (((document.body.offsetWidth + 20) - (settings.width))/2);
					}else{
						centeredY = window.screenY + (((window.outerHeight - settings.height)/2));
						centeredX = window.screenX + (((window.outerWidth - 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);