以下是引用片段:
<script type="text/javascript" language="javascript"> var xmlHttp = null; function CheckUser() { try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch(err1) { try { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch(err2) { xmlHttp = new XMLHttpRequest(); } } var Text1 = document.getElementById("Text1"); var url = "chkuser.aspx?User=" + Text1.value; xmlHttp.open("GET",url,true); xmlHttp.onreadystatechange = OnHandler; xmlHttp.send(null);
} function OnHandler() { if(xmlHttp.readyState == 4) { var isValid = xmlHttp.responseText; var exists = document.getElementById("exsits"); exists.innerHTML = isValid.substring(0,4); } } </script> <input id="Text1" type="text" onblur="CheckUser()" /><label d="exsits"></label><br /> |