cookieUtil.js

╰半夏微凉° 2022-08-27 05:51 27阅读 0赞

function cookieUtil() {
    		this.getCookie = getCookie;
    		this.setCookie = setCookie;
    		this.checkCookie = checkCookie;
    		this.delCookie=delCookie;
    		this.clearCookies=clearCookies;
    		this.begin=begin;
    		function begin(){
    			alert('cookieUtil.js');
    		}
    		
    		function clearCookies(){//删除所有cookies 
    			var cookies = document.cookie.split(";");
    			for ( var i = 0; i < cookies.length; i++) {
    				var exp = new Date();
    			    exp.setTime(exp.getTime() - 1);
    				var cookie = cookies[i];
    				var eqPos = cookie.indexOf("=");
    				var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
    				var domain = location.host.substr(location.host.indexOf('.'));
    				document.cookie = name
    						+ "=;expires="+ exp.toGMTString();	
    			}
    		}
    		
    		function delCookie(name) {//删除cookies 
    			var exp = new Date();
    			exp.setTime(exp.getTime() - 1);
    			var cval = getCookie(name);
    			if (cval != null)
    				document.cookie = name + "=" + cval + ";expires="
    						+ exp.toGMTString();
    		}
    		function getCookie(c_name) {//获取cookie
    			if (document.cookie.length > 0) {
    				c_start = document.cookie.indexOf(c_name + "=");
    				if (c_start != -1) {
    					c_start = c_start + c_name.length + 1;
    					c_end = document.cookie.indexOf(";", c_start);
    					if (c_end == -1) {
    						c_end = document.cookie.length
    					}
    					return unescape(document.cookie.substring(c_start, c_end))
    				}
    			}
    			return ""
    		}
    
    		function setCookie(c_name, value, expiredays) {//设置cookie
    			var exdate = new Date();
    			exdate.setDate(exdate.getDate() + expiredays);
    			document.cookie = c_name
    					+ "="
    					+ escape(value)
    					+ ((expiredays == null) ? "" : ";expires="
    							+ exdate.toGMTString());
    		}
    
    		function checkCookie(name) {//检测cookie是否存在
    			var username = getCookie(name);
    			if (username != null && username != "") {
    				alert('Welcome again ' + username + '!');
    			} else {
    				username = prompt('Please enter your name:', "");
    				if (username != null && username != "") {
    					setCookie('username', username, 365);
    				}
    			}
    		}
    	}

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