jQuery(document).ready(function(){ 
 
		function getHiCookie(name)//取cookies函数
		{
				 var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
				 if(arr != null){ 
					 return unescape(arr[2]); 
				 }else{
					return null;
				 }
		}
		  
		if( getHiCookie("tthiread") == null ){
			var exp = new Date(); 
			exp.setTime(exp.getTime() + 24*60*60*1000);
			document.cookie = "tthiread" + "="+ escape (1)+ ";expires=" + exp.toGMTString(); 
			jQuery('body').coverDiv();
		} 
})