时间:2021-07-01 10:21:17 帮助过:7人阅读
// JavaScript Document var XHR; function createXHR(){ if(window.ActiveXObject){ XHR=new ActiveXObject('Microsoft.XMLHTTP'); }else if(window.XMLHttpRequest){ XHR=new XMLHttpRequest(); } } function checkname(){ var username=document.form1.host.value; createXHR(); XHR.open("GET","./checkname.php?id="+username,true); XHR.onreadystatechange=byhongfei; XHR.send(null); } function byhongfei(){ if(XHR.readyState == 4){ if(XHR.status == 200){ var textHTML=XHR.responseText; document.getElementById('msg').innerHTML=textHTML; } } }
用户名可以使用"; } mysql_close(); ?>
document.getElementById("button").disabled = 'true';//禁用 document.getElementById("button").removeAttribute("disabled");//恢复
------解决方案--------------------
function byhongfei(){ if(XHR.readyState == 4){ if(XHR.status == 200){ var textHTML=XHR.responseText; document.getElementById('msg').innerHTML=textHTML; if(textHTML == "用户名已存在"){ document.getElementById("button").disabled = 'true';//禁用 } } } }