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js如下：

function $(id){    return document.getElementById(id);}var oId = $('Id');var sId = oId.value;var oMsg = $('Msg-form');var oName = $('Name');var oEmail = $('Email');var oPassword = $('Password');var oCheckPassword = $('CheckPassword');var str = document.getElementsByTagName('em');oMsg.onsubmit = function(){// 账号判断var sId = oId.value;var regId = /^[a-zA-Z0-9_]\w{4,15}$/;if(regId.test(sId)){    str[0].innerHTML = '√';} else{    str[0].innerHTML = '×';}// 判断中英文var sName = oName.value;var regName = /^[\u2E80-\u9FFF]+$/;if(regName.test(sName)){    str[1].innerHTML = '√';} else{    str[1].innerHTML = '×';} // 判断邮箱var sEmail = oEmail.value;var regEmail = /^[a-z\d]+(\.[a-z\d]+)*@([\da-z](-[\da-z])?)+(\.{1,2}[a-z]+)+$/;if(regEmail.test(sEmail)){    str[2].innerHTML = '√';}else{    str[2].innerHTML = '×';} // 判断密码var sPassword = oPassword.value;var regPassword = /^[a-zA-Z0-9]\w{3,15}$/;if(regPassword.test(sPassword)){    str[3].innerHTML = '√';}else{    str[3].innerHTML = '×';}// 判断再次输入的密码是否和上一次一致 var sCheckPassword = oCheckPassword.value;if(sCheckPassword === sPassword){    str[4].innerHTML = '√';}else{    str[4].innerHTML = '×';}function setCookie(name,value,days,path){    days = days || 0;    path = path || '/';    var oDate = new Date();    oDate.setDate(oDate.getDate() + days);    document.cookie = name + '=' + encodeURIComponent(value) + ';expires=' + oDate + ';path=' + path;}var oDay = $('day');    if(oDay.checked){        setCookie('username',sId,10);        setCookie('pwd',sPassword,10);    }}

 

// 设置cookie

// 封装