How to realize the Application of non-refresh in registering user name by Ajax
This article mainly describes how Ajax can achieve no refresh in the registration of user name applications, the text is very detailed, has a certain reference value, interested in small partners must read!
var xmlHttp;
uName() //username when out of focus
{
if(all.uname.== "")
{
all.l1[xss_clean]="Cannot be empty! ";
setTimeout("close(1)",1500);
return;
}
else
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
xmlHttp.onreadystatechange=deal; //callback function
var url="aJax.aspx? user='"+all.uname.+ "'"; //You will be redirected to the page where the username is detected
xmlHttp.open ("get",url,true); //submit the form to url in get mode; and start one-step processing
xmlHttp.send(null); //send
}
}
deal()
{
//alert(xmlHttp.readystate+"__"+xmlHttp.status);
if(xmlHttp.readystate!= 4)
{return; }
if(xmlHttp.status!= 200)//is equal to 500 sql statement or database error
{return;}
//
var num = xmlHttp.responseText; //Receive messages sent by the server
//alert(num);
all.l1.innerText="";
if(num>0)
{
all.l1.innerText="Secondary username already in use! ";
}
else
{
all.l1.innerText="√";
}
}
The above is "Ajax how to achieve no refresh in the registration of user name application" all the content of this article, thank you for reading! Hope to share the content to help everyone, more relevant knowledge, welcome to pay attention to the industry information channel!
