| code is as follows |
copy code |
| If (document.register.email.value.charAt (0) = = "." | |
Document.register.email.value.charAt (0) = = "@" | |
Document.register.email.value.indexOf (' @ ', 0) = = 1 | |
document.register.email.value.indexOf ('. ', 0) = = 1 | |
document.register.email.value.lastIndexOf ("@") = = document.register.email.value.length-1 | |
document.register.email.value.lastIndexOf (".") ==document.register.email.value.length-1)
{
alert ( "E-mail format is not correct!" ");
Document.register.email.focus ();
return false;
} SendRequest ("checkemail.asp?email=" + document.register.email.value);
if (return_str== "0") {
Alert ("This mailbox already exists, please choose another");
Document.register.email.focus ();
Document.register.email.select ();
return False
} |
Ajax processing
| The code is as follows |
Copy Code |
var return_str= ""
XMLHTTP = new ActiveXObject ("Msxml2.xmlhttp");
function SendRequest (SNDSTR)
{
var xmldom = new ActiveXObject ("Msxml2.domdocument");
Xmlhttp.open ("Get", Sndstr, false);
Xmlhttp.onreadystatechange = Sendrequest_check;
xmlHTTP. Send (XMLDOM);
}
//--------------------------------------------------------
function Sendrequest_check ()
{
var state = Xmlhttp.readystate;
var xmldom = new ActiveXObject ("Msxml2.domdocument");
if (state = = 4)
{
XMLDOM.loadXML (Xmlhttp.responseXML.xml);
Return_str = XmlDom.documentElement.selectSingleNode ("//objxml"). Text;
}
} |
checkemail.asp file you only have to accept the user's information, in the database to check the KO.
