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1.Ê×ÏÈÔÚ·þÎñÆ÷ÉϽ¨Á¢Ò»¸öCheckUser.aspÎļþ£¬ÓÃÀ´¼ì²âÓû§ÊÇ·ñ´æÔÚ£¬¸ù¾ÝÓû§ÊÇ·ñ´æÔÚ·Ö±ð·´À¡0ºÍ1
u_name=Request.QueryString("u_name")
if u_name ´æÔÚ then
Response.write "0"
else
Response.write "1"
end if
2.¿Í»§¶ËHTMLÉè¼Æ:
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<script language=javascript>
function check_user_exists(form){
u_name=form.u_name.value;
if (u_name==null||u_name==''){
alert("ÇëÄúÊäÈëÓû§Ãû");
return false;
}
infoBoard=document.getElementById("checkInfo");
infoBoard.innerText='²éѯÖÐ...';
myurl=location.protocol+"//"+location.hostname+"/CheckUser.asp?u_name="+u_name;
retCode=openUrl(myurl);
switch(retCode){
case "-2":
infoBoard.innerHTML='<font color=red>±§Ç¸</font>,²éѯʧ°Ü';break;
case "1":
infoBoard.innerHTML='<font color=red>¹§Ï²</font>,'+u_name+'¿ÉÒÔʹÓÃ';break;
case "0":
infoBoard.innerHTML='<font color=red>±§Ç¸</font>£¬Óû§Ãû'+u_name+'ÒѾ­±»Ê¹ÓÃ';
}
return;
}
function openUrl(url){
var objxml=new ActiveXObject("Microsoft.XMLHttp")
objxml.open("GET",url,false);
objxml.send();
retInfo=objxml.responseText;
if (objxml.status=="200"){
return retInfo;
}
else{
return "-2";
}
}
</script>
¶þ¡¢HTML±íµ¥Éè¼Æ:
<form name=form1 action="XXXX.asp" method="post">
<input type=text name=u_name><span id="checkInfo"></span><input type=button name=checkuser
value="¼ì²âÓû§ÊÇ·ñ´æÔÚ" onClick="check_user_exists(this.form);">
</form>
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