ajax 注册验证

';
}
}else{
echo " ";
}

好了我还是反ajax 代码也写出来吧,

var xmlHttp = false;

function ajaxcreate(){

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;}
}

ajaxcreate();
xmvalue=document.getElementById("blog").value;
var url="ajax_check.php?txt="+encodeURI(xmvalue)+"&tag="+encodeURI(str)+"&rd="+Math.random();
if (xmvalue== null || xmvalue.length>200 || 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("u_info").innerHTML="

";
}
if(xmlHttp.readyState == 4 ){
document.getElementById("u_info").innerHTML=xmlHttp.responseText;

}
}

OK下面这段我以前写过了,不过为了方便还是也写出来了,最后申明一下:本站原创文章转载请注明来: www.111cn.net/phper/php.html