function virtual_tour(data) {
	var wWidth = window.screen.availWidth;
	var wHeight = window.screen.availHeight;
  	var xpos, ypos = 0;
	var w = 903, h = 450;

  	if(wWidth > w) {
    	xpos = (wWidth - w)/2;
  	}
  	if(wHeight > h) {
    	ypos = (wHeight - h)/2;
  	}
  	
window.open(data+"/virtual-tour/TourWeaver_andelrestaurant.html", "_blank", "status=yes, top=0, left=0, width=903, height=450, status=no, top=" + ypos + ", left=" + xpos);
}