<script> window.onload = function(){ var oForm = document.getElementById(‘loginForm‘); var oUser = document.getElementById(‘user‘); var oPswd = document.getElementById(‘pswd‘); var oRemember = document.getElementById(‘remember‘); //页面初始化时，如果帐号密码cookie存在则填充 if(getCookie(‘user‘) && getCookie(‘pswd‘)){ oUser.value = getCookie(‘user‘); oPswd.value = getCookie(‘pswd‘); oRemember.checked = true; } //复选框勾选状态发生改变时，如果未勾选则清除cookie oRemember.onchange = function(){ if(!this.checked){ delCookie(‘user‘); delCookie(‘pswd‘); } }; //表单提交事件触发时，如果复选框是勾选状态则保存cookie oForm.onsubmit = function(){ if(remember.checked){ setCookie(‘user‘,oUser.value,7); //保存帐号到cookie，有效期7天 setCookie(‘pswd‘,oPswd.value,7); //保存密码到cookie，有效期7天 } }; }; //设置cookie function setCookie(name,value,day){ var date = new Date(); date.setDate(date.getDate() + day); document.cookie = name + ‘=‘ + value + ‘;expires=‘+ date; }; //获取cookie function getCookie(name){ var reg = RegExp(name+‘=([^;]+)‘); var arr = document.cookie.match(reg); if(arr){ return arr[1]; }else{ return ‘‘; } }; //删除cookie function delCookie(name){ setCookie(name,null,-1); };</script>js保存用户名与密码
原文地址：http://www.cnblogs.com/axu92312/p/8086981.html