$(function(){
		//Display the popup 
		$('.wvPopupOverlay, .wvPopup').css('display', 'block');
		$('.wvPopupOverlay').css('zoom', '1');
		
		//calculate the width of the window and therefore the left hand margin
		var dimensions = {width: 0, height: 0};
		if (document.documentElement) {
			dimensions.width = document.documentElement.offsetWidth;
			dimensions.height = document.documentElement.offsetHeight;
		} else if (window.innerWidth && window.innerHeight) {
			dimensions.width = window.innerWidth;
			dimensions.height = window.innerHeight;
		}
		var leftamount = (dimensions.width - 427)/2;
		//set the left hand margin
		$('.wvPopup').css('left', leftamount);
		$('.wvPopupOverlay').css('height', document.body.clientHeight);
		
		//upon clicking the close button hide the popup
		$('.wvPopupCloseButton').click(function(){
		$('.wvPopupOverlay, .wvPopup').css('display', 'none');
		});
});