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onreadystatechange

指定當(dāng)readyState屬性改變時(shí)的事件處理句柄

語(yǔ)法

oXMLHttpRequest.onreadystatechange = funcMyHandler;

Example

如下的例子演示當(dāng)XMLHTTPRequest對(duì)象的readyState屬性改變時(shí)調(diào)用HandleStateChange函數(shù),當(dāng)數(shù)據(jù)接收完畢后(readystate == 4)此頁(yè)面上的一個(gè)按鈕將被激活

var xmlhttp=null;
function PostOrder(xmldoc)
{
  var xmlhttp = new ActiveXObject("Msxml2.XMLHTTP.5.0");
  xmlhttp.Open("POST", "http://myserver/orders/processorder.asp", false); 
  xmlhttp.onreadystatechange= HandleStateChange;
  xmlhttp.Send(xmldoc);
  myButton.disabled = true;
}
function HandleStateChange()
{
  if (xmlhttp.readyState == 4)
  {
    myButton.disabled = false;
    alert("Result = " + xmlhttp.responseXML.xml);
  }
}

備注

此屬性只寫,為W3C文檔對(duì)象模型的擴(kuò)展.

參考

readyState 屬性