[Original] ajax user registration function tutorial 2

[Original] ajax user registration function tutorial 2 ','

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This tutorial is original on this site.

Author: www.drise.cn

Email: drise@163.com

QQ: 271728967

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The first reg. php file above has been completed, so I will do the second step.

Var xmlHttp = false;
Function ajaxcreate () {// here is the creation of the xmlhttpt object

Try {
XmlHttp = new ActiveXObject ("Msxml2.XMLHTTP ");
} Catch (e ){

Try {
XmlHttp = new ActiveXObject ("Microsoft. XMLHTTP ");
} Catch (e2 ){

XmlHttp = false;
}

}

If (! XmlHttp & typeof XMLHttpRequest! =\\ 'Undefined \\\'){

XmlHttp = new XMLHttpRequest ();

}

If (! XmlHttp) {alert (\ 'create Xmlhttp Fail \ '); return false ;}

}

Function ajax () {// the operation to be performed after the reg. php onblur () event is received,

Ajaxcreate ();

Var xmvalue = document. getElementById ("xm"). value;

Var url = "/boke/blog/type. php? Txt = "+ encodeURI (xmvalue );

If (xmvalue = null | xmvalue. length> 20 | xmvalue = "") return false;

XmlHttp. open ("POST", url, true );

XmlHttp. setRequestHeader ("Content-Type", "application/x-www-form-urlencoded ");

XmlHttp. send (xmvalue );

XmlHttp. onreadystatechange = returnstate;

}

Function returnstate (){

If (xmlHttp. readyState! = 4 ){

Document. getElementById ("divxm "). innerHTML = "<div id =\\\ 'phperblog _ showinfo_red \\\ '> <font color = red> verifying. Please wait... </font> </div> ";

}

If (xmlHttp. readyState = 4 ){

Document. getElementById ("divxm"). innerHTML = xmlHttp. responseText;

}

}