jQuery.cookie = function(name, value, options) { 
if (typeof value != 'undefined') { // name and value given, set cookie 
       options = options || {}; 
       if (value === null) { 
         value = ''; 
         options.expires = -1; 
       } 
       var expires = ''; 
       if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) { 
         var date; 
         if (typeof options.expires == 'number') { 
            date = new Date(); 
            date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000)); 
         } else { 
            date = options.expires; 
         } 
         expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE 
       } 
       var path = options.path ? '; path=' + options.path : ''; 
       var domain = options.domain ? '; domain=' + options.domain : ''; 
       var secure = options.secure ? '; secure' : ''; 
       document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join(''); 
} else { // only name given, get cookie 
       var cookieValue = null; 
       if (document.cookie && document.cookie != '') { 
         var cookies = document.cookie.split(';'); 
         for (var i = 0; i < cookies.length; i++) { 
            var cookie = jQuery.trim(cookies[i]); 
            // Does this cookie string begin with the name we want? 
            if (cookie.substring(0, name.length + 1) == (name + '=')) { 
                   cookieValue = decodeURIComponent(cookie.substring(name.length + 1)); 
                   break; 
            } 
         } 
       } 
       return cookieValue; 
} 
};

$(document).ready(function() {
$.fn.blackdiv=function(){

  this.MaskDiv=function()
       {
       
       var wnd = $(window), doc = $(document);
       //alert(doc.height());
       if(wnd.height() > doc.height()){ 
        wHeight = wnd.height();  
       }else{
        wHeight = doc.height();   
       }
       $("#zezhao").append("<div ID=MaskID></div>");
       $("#zezhao").find("#MaskID").width(wnd.width()).height(wHeight)
       .css({position:"absolute",top:"0px",left:"0px",background:"#000",filter:"Alpha(opacity=70);",opacity:"0.7",zIndex:"1",display:"block"});
       }
       this.sPosition=function(obj)
       {
			  var MyDiv_w = parseInt(obj.width());
			  var MyDiv_h = parseInt(obj.height());
			  
			  var width =parseInt($(document).width());
			  var height = parseInt($(window).height());
			  var left = parseInt($(document).scrollLeft());
			  var top = parseInt($(document).scrollTop());
		
			  var Div_topposition = top + (height / 2) - (MyDiv_h / 2); 
			  var Div_leftposition = left + (width / 2) - (MyDiv_w / 2);
			  return Array(Div_topposition,Div_leftposition);
       }
       this.MaskDiv();
      return this;
 }
   
})
function showblackdiv(){
	$("#MaskID").remove();
	$("body").blackdiv();
	$("#flash3d").css({position:"absolute",top:"100px",zIndex:"2"});
}
function closeblackdiv(){
	//$("#index").css({position:"static",zIndex:"2"}).show("slow");
	$("#MaskID").remove();
}