function checkvalue()
{
var email=document.theform.mailfield.value;
var email2 = document.theform.mailfield.value.substr
(document.theform.mailfield.value.indexOf("@") + 1)
if (!CheckNotNull(email)){
alert("please input the email address!");
return false;
}
if ((email.indexOf("@") == -1) ||
(email.indexOf("@") == 0) ||
(email.indexOf("@") != email.lastIndexOf("@")) ||
(email2.indexOf(".") == -1) ||
(email2.indexOf(".") == 0) ||
((email.indexOf(".") + 1) == email.length)){
alert("Please input a valid email address!");
return false;
}
else{
document.theform.clicked.value="confirm";
return true;
}
}
{
var email=document.theform.mailfield.value;
var email2 = document.theform.mailfield.value.substr
(document.theform.mailfield.value.indexOf("@") + 1)
if (!CheckNotNull(email)){
alert("please input the email address!");
return false;
}
if ((email.indexOf("@") == -1) ||
(email.indexOf("@") == 0) ||
(email.indexOf("@") != email.lastIndexOf("@")) ||
(email2.indexOf(".") == -1) ||
(email2.indexOf(".") == 0) ||
((email.indexOf(".") + 1) == email.length)){
alert("Please input a valid email address!");
return false;
}
else{
document.theform.clicked.value="confirm";
return true;
}
}
{
var email=document.theform.mailfield.value;
var email2 = document.theform.mailfield.value.substr
(document.theform.mailfield.value.indexOf("@") + 1)
if (!CheckNotNull(email)){
alert("please input the email address!");
return false;
}
if ((email.indexOf("@") == -1) ||
(email.indexOf("@") == 0) ||
(email.indexOf("@") != email.lastIndexOf("@")) ||
(email2.indexOf(".") == -1) ||
(email2.indexOf(".") == 0) ||
((email.indexOf(".") + 1) == email.length)){
alert("Please input a valid email address!");
return false;
}
else{
return true;
}
}
function test_email(strEmail) {
var myReg = /^[_a-z0-9]+@([_a-z0-9]+\.)+[a-z0-9]{2,3}$/;
if(myReg.test(strEmail)) return true;
return false;
}