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var xmlHttp
function showHint(str)
{
if(str.length==0)
{
document.getElementById("txtHint").innerHTML="";
return;
}
xmlHttp=GetXmlHttpObject();
if(xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return;
}
var url="gethint.php";
$.getJSON("gethint.php",{"danyuan":$("#unit").val()},function(json){
alert("gdrg");
});
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}
function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById("txtHint").innerHTML=xmlHttp.responseText
}
}
function GetXmlHttpObject()
{
var xmlHttp=null;
try
{
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
<?php
$unit=$_GET["danyuan"];
$json=json_decode($unit);
echo $unit;