Cookie方法封装

		function setCookie(name,value,iDay){
			var oDate=new Date();
			oDate.setDate(oDate.getDate()+iDay);
			document.cookie=name+'='+value+';expires='+oDate;
		}
		function getCookie(name){
			var arr=document.cookie.split('; ');
			for(var i=0;i<arr.length;i++){
				var arr2=arr[i].split('=');
				if(arr2[0]==name){
					return arr2[1];
				}
			}
			return '';
		}
		function removeCookie(name){
			setCookie(name,1,-1);
		}