/*
 * This code has been gratefully taken from
 * http://www.accessify.com/features/tutorials/the-perfect-popup/
 */

var newWindow = null;


function addEvent(elm, evType, fn, useCapture) {
	if(elm.addEventListener) {
		elm.addEventListener(evType, fn, useCapture);
		return true;
	}
	else if (elm.attachEvent) {
		var r = elm.attachEvent('on' + evType, fn);
		return r;
	}
	else {
		elm['on' + evType] = fn;
	}
}


function closeWin(){
	if (newWindow != null){
		if(!newWindow.closed)
			newWindow.close();
	}
}


function popUpWin(url, type, strWidth, strHeight) {
	closeWin();
		
	type = type.toLowerCase();
	
	if (type == "fullscreen"){
		strWidth = screen.availWidth;
		strHeight = screen.availHeight;
	}
	var tools = "";
	if (type == "standard") 
		tools = "resizable,toolbar=yes,location=yes,scrollbars=yes,menubar=yes,width="+strWidth+",height="+strHeight+",top=0,left=0";
	if (type == "console" || type == "fullscreen") 
		tools = "resizable,toolbar=no,location=no,scrollbars=no,width="+strWidth+",height="+strHeight+",left=0,top=0";

	newWindow = window.open(url, 'newWin', tools);
	newWindow.focus();
}


function doPopUp(e)
{
	// set defaults - if nothing in rel attrib, these will be used
	var t = "standard";
	var w = "780";
	var h = "580";
	
	// look for parameters
	attribs = this.rel.split(" ");
	if (attribs[1]!=null) {t = attribs[1];}
	if (attribs[2]!=null) {w = attribs[2];}
	if (attribs[3]!=null) {h = attribs[3];}

	// call the popup script
	popUpWin(this.href,t,w,h);

	// cancel the default link action if pop-up activated
	if (window.event) {
		window.event.returnValue = false;
		window.event.cancelBubble = true;
	} 
	else { 
		if (e) {
			e.stopPropagation();
			e.preventDefault();
		}
	}
}


function findPopUps() {
	var popups = document.getElementsByTagName("a");
	for (i=0;i<popups.length;i++) {
		if (popups[i].rel.indexOf("popup") != -1) {
			// attach popup behaviour
			popups[i].onclick = doPopUp;

			// add popup indicator
			if (popups[i].rel.indexOf("noicon") == -1) {
				popups[i].style.backgroundImage = "url(pop-up.gif)";
				popups[i].style.backgroundPosition = "0 center";
				popups[i].style.backgroundRepeat = "no-repeat";
				popups[i].style.paddingLeft = "15px";
			}

			// add info to title attribute to alert fact that it's a pop-up window
			popups[i].title = popups[i].title + " [Opens in pop-up window]";
		}
	}
}

addEvent(window, 'load', findPopUps, false);