javascriptfunction checkemail()
{
if ("" == document.lyform.email.value) {
alert("请输入邮件地址")
document.lyform.email.focus()
return false
}
var email = document.lyform.email.value
var is_error = false
var pn_0 = email.indexOf("")
var pn_1 = email.indexOf(".",pn_0)
var pn_2 = email.length
if (pn_0<1 || pn_1<pn_0+2 || pn_1+2>pn_2) is_error=true
if (is_error) {
alert("请输入正确的邮件地址")
document.lyform.email.focus()
return false
}
}
javascript电子邮件(email)验证
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