function keepBrowsing() {
	$("#dimmer").css("display", "none");
	$("#messagePopup").css("display", "none");
}

function centreElement(el, elWidth, elHeight)
{
    var element = el;
	var my_width  = 0;
    var my_height = 0;
    
    if (typeof(window.innerWidth) == "number") {
        my_width  = window.innerWidth;
        my_height = window.innerHeight;
    } else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
        my_width  = document.documentElement.clientWidth;
        my_height = document.documentElement.clientHeight;
    } else if ( document.body && ( document.body.clientWidth || document.body.clientHeight )) {
        my_width  = document.body.clientWidth;
        my_height = document.body.clientHeight;
    }
    
    element.style.position = "absolute";
    var scrollY = 0;
    
    if (document.documentElement && document.documentElement.scrollTop) {
        scrollY = document.documentElement.scrollTop;
    } else if ( document.body && document.body.scrollTop ) {
        scrollY = document.body.scrollTop;
    } else if ( window.pageYOffset ) {
        scrollY = window.pageYOffset;
    } else if ( window.scrollY ) {
        scrollY = window.scrollY;
    }
    
    var setX = (my_width-elWidth) / 2;
    var setY = (my_height-elHeight) / 2 + scrollY;
    setX = (setX < 0) ? 0 : setX;
    setY = (setY < 0) ? 0 : setY;
    element.style.left = setX + "px";
    element.style.top  = setY + "px";
    element.style.display = "block";
}