function onOpenBox(overlayname,boxname) {
	   var overlayDiv = document.getElementById(overlayname);
	   var boxDiv = document.getElementById(boxname);
	   overlayDiv.style.display = 'block';
	   boxDiv.style.display = 'block';
	   center(boxDiv,overlayname);
	}
	
	function onCloseBox(overlayname,boxname) {
	   var overlayDiv = document.getElementById(overlayname);
	   var boxDiv = document.getElementById(boxname);
	   overlayDiv.style.display = 'none';
	   boxDiv.style.display = 'none';
	}
	
	function center(element,overlayname) {
	   var my_width  = 0;
	   var my_height = 0;
	   var divWidth = 730;
	   var divHeight = 1100;
	   
	
	   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';
	   element.style.zIndex   = 99;
	
	   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  - divWidth  ) / 2;
	   var setY = ( my_height - divHeight ) / 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';
	   var overlayDiv = document.getElementById(overlayname);
	   overlayDiv.style.width = my_width + "px";
	   overlayDiv.style.height = my_height + "px";
	   overlayDiv.style.top = scrollY + "px";
	   overlayDiv.style.left = "0px";
	
	}