/*******************************************************************************
*  Add to favourites function. Displays confirmation box.
*******************************************************************************/
function alertFavourite() {
	if (document.all) {
		msg = "Add this site to your favourites?\n";
    	if (confirm(msg)) {
			window.external.AddFavorite(location.href,document.title);
		}
	}
}

function openPopup(url,x,y){ 
    newPopupWindow = window.open(url, "newPopupWindow", "location=no,width="+x+",height="+y+",scrollbars=yes");
} 

/* The link that calls the pop up window looks like this:
<a href="javascript:popup('example.htm',100,100)">Example</a> */

function centreWindowPopup(url,x,y) {
    var x2 = (screen.height/2) - (x/2);
    var y2 = (screen.width/2) - (y/2);
    window.open(url, "newPopupWindow", "location=no,width="+x+",height="+y+",top="+x2+",left="+y2+",scrollbars=yes");
}

/* The link that calls the pop up window looks like this:
<a href="javascript:centreWindowPopup('example.htm',100,100)">Example</a> */