使用Ajax实现输入提示-优快云博客

本文链接：https://blog.youkuaiyun.com/lishushan/article/details/83529056

Ajaxtest.htm:

<html><head>
<script language="javascript">
function GetXmlHttpObject()
{
var xmlHttp=null;
try{xmlHttp=new XMLHttpRequest();}/* Firefox, Opera 8.0+, Safari*/
catch (e){
    try{xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); }/* Internet Explorer*/
    catch (e){xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); }
    }
return xmlHttp;
}
function showHint(str)
{

if (str.length==0)
    {
    document.getElementById("txtHint").innerHTML="";
    return;
    }

xmlHttp=GetXmlHttpObject();

if (xmlHttp==null)
    {
    document.getElementById("txtHint").innerHTML="您的浏览器不支持AJAX！";
    return;
    }

var url="http://www.w3school.com.cn/ajax/gethint.asp";
url=url+"?q="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}
function stateChanged()
{
if (xmlHttp.readyState==4)
{
document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
}
}
</script>
</head>
<body>

<form>
First Name:<input type="text" id="txt1" onKeyUp="showHint(this.value)" />
</form>

<p>Suggestions: <span id="txtHint"></span></p>

</body>
</html>

gethint.asp:

<%
response.expires=-1
dim a(30)

'用名字为数组赋值
a(1)="Anna"
a(2)="Brittany"
a(3)="Cinderella"
a(4)="Diana"
a(5)="Eva"
a(6)="Fiona"
a(7)="Gunda"
a(8)="Hege"
a(9)="Inga"
a(10)="Johanna"
a(11)="Kitty"
a(12)="Linda"
a(13)="Nina"
a(14)="Ophelia"
a(15)="Petunia"
a(16)="Amanda"
a(17)="Raquel"
a(18)="Cindy"
a(19)="Doris"
a(20)="Eve"
a(21)="Evita"
a(22)="Sunniva"
a(23)="Tove"
a(24)="Unni"
a(25)="Violet"
a(26)="Liza"
a(27)="Elizabeth"
a(28)="Ellen"
a(29)="Wenche"
a(30)="Vicky"

'从URL取得参数q
q=ucase(request.querystring("q"))

'如果q的长度大于0，则查找所有的hint
if len(q)>0 then
hint=""
for i=1 to 30
    if q=ucase(mid(a(i),1,len(q))) then
      if hint="" then
        hint=a(i)
      else
        hint=hint & " , " & a(i)
      end if
    end if
next
end if

'如果找不到hint，则输出"no suggestion"
'或者输出正确的值
if hint="" then
response.write("no suggestion")
else
response.write(hint)
end if
%>