Ajax callback function Status

Ajax callback function Status

Function readyDo (){
// Alert (xhr. readyState + "points" + xhr. Status );
If (xhr. readyState = 4 & xhr. status = 200 ){
Var result = xhr. responseText;
If (result = "true "){
Document. getElementById ("title"). innerHTML = "";
Return true;
} Else {
Document. getElementById ("title"). innerHTML = "this user name exists ";
Return false;
}
}
}
This code string is used to determine whether the returned status is passed. Note that status = 200, s is in the lower case of IE, Google, and openg,
You only need to pass Status = 200, S capital, only in IE browser, other browsers cannot pass, and
In the IE browser, the returned values of readyState and Status are 4 and 200, but in Google or oupeng browser
Returned value: readyState = 4 status = undefined.

Reprinted from: http://www.aspnetjia.com