建立XMLHttpRequest对象

时间：2021-05-18

utl.js
复制代码 代码如下:functioncreateXmlTree(node,indent){

if(node==null)
return"";
varstr="";

switch(node.nodeType){
case1://Element
str+="<divclass='element'>&lt;<spanclass='elementname'>"+node.nodeName+"</span>";

varattrs=node.attributes;
for(vari=0;i<attrs.length;i++)
str+=createXmlAttribute(attrs[i]);

if(!node.hasChildNodes())
returnstr+"/&gt;</div>";

str+="&gt;<br/>";

varcs=node.childNodes;
for(vari=0;i<cs.length;i++)
str+=createXmlTree(cs[i],indent+3);

str+="&lt;/<spanclass='elementname'>"+node.nodeName+"</span>&gt;</div>";
break;

case9://Document
varcs=node.childNodes;
for(vari=0;i<cs.length;i++)
str+=createXmlTree(cs[i],indent);
break;

case3://Text
if(!/^\s*$/.test(node.nodeValue))
str+="<spanclass='text'>"+node.nodeValue+"</span><br/>";
break;

case7://ProcessInstruction
str+="&lt;?"+node.nodeName;

varattrs=node.attributes;
for(vari=0;i<attrs.length;i++)
str+=createXmlAttribute(attrs[i]);

str+="?&gt;<br/>"
break;

case4://CDATA
str="<divclass='cdata'>&lt;![CDATA[<spanclass='cdata-content'>"+
node.nodeValue+
"</span>]"+"]></div>";
break;

case8://Comment
str="<divclass='comment'>&lt;!--<spanclass='comment-content'>"+
node.nodeValue+
"</span>--></div>";
break;

case10:
str="<divclass='doctype'>&lt;!DOCTYPE"+node.name;
if(node.publicId){
str+="PUBLIC\""+node.publicId+"\"";
if(node.systemId)
str+="\""+node.systemId+"\"";
}
elseif(node.systemId){
str+="SYSTEM\""+node.systemId+"\"";
}
str+="&gt;</div>";

//TODO:HandlecustomDOCTYPEdeclarations(ELEMENT,ATTRIBUTE,ENTITY)

break;

default:
//alert(node.nodeType+"\n"+node.nodeValue);
inspect(node);
}

returnstr;
}

functioninspect(obj){
varstr="";
for(varkinobj)
str+="obj."+k+"="+obj[k]+"\n";
window.alert(str);
}

functioncreateXmlAttribute(a){
return"<spanclass='attribname'>"+a.nodeName+"</span><spanclass='attribvalue'>=\""+a.nodeValue+"\"</span>";
}
复制代码 代码如下:

<HTML><HEAD><TITLE>Ajax test</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<SCRIPT src="Ajax test_files/utl.js"></SCRIPT>
<LINK rev=stylesheet media=all href="Ajax test_files/Ajax.css" type=text/css
rel=stylesheet>
<SCRIPT>
//------------ XMLHttpObj类 ----------------
function XMLHttpObject(url,Syne){
var XMLHttp=null
var o=this
this.url=url
this.Syne=Syne
this.sendData = function()
{
if (window.XMLHttpRequest) {
XMLHttp = new XMLHttpRequest();
} else if (window.ActiveXObject) {
XMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
with(XMLHttp){
open("GET", this.url, this.Syne);
onreadystatechange = o.CallBack;
send(null);
}
}

this.CallBack=function()
{
if (XMLHttp.readyState == 4) {
if (XMLHttp.status == 200) {
o.debugXML("readyState:" + XMLHttp.readyState + "<br/>")
o.debugXML("status :" + XMLHttp.status + "<br/>")
o.debugXML(" <div style='background:#ffc;margin-left:10px;border:1px solid #669;padding:3px'>" + createXmlTree(XMLHttp.responseXML,0) + "</div>")
}
}

}

this.getText=function()
{
if (XMLHttp==null) {return "还没加载 XMLHttpRequest"}
if (XMLHttp.readyState==4) {return XMLHttp.responseText}
return XMLHttp.readyState
}

this.debugXML=function(log)
{
try{document.getElementById("XMLDebug").innerHTML+=log}
catch(e){}
}
}
var XMLDoc1=new XMLHttpObject("tree.xml",true)

</SCRIPT>

<META content="MSHTML 6.00.3790.2706" name=GENERATOR></HEAD>
<BODY><SELECT
onchange='XMLDoc1.url=this.value;document.getElementById("XMLDebug").innerHTML=""'>
<OPTION value=tree.xml selected>tree.xml</OPTION> <OPTION
value=xtree.xsl>xtree.xsl</OPTION> <OPTION value=/feed.asp>Blog
Feed</OPTION></SELECT> <INPUT onclick=XMLDoc1.sendData() type=button value=XMLDoc1.sendData()> <INPUT onclick=alert(XMLDoc1.getText()) type=button value=XMLDoc1.getText()> <INPUT onclick="if (confirm('clear log?')) {document.getElementById('XMLDebug').innerHTML=''}" type=button value=ClearLog>

<DIV id=XMLDebug></DIV></BODY></HTML>


复制代码 代码如下:
HTML {
BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px
}
BODY {
BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px
}
BODY {
BACKGROUND: buttonface; FONT: Message-Box
}
FORM {
PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-TOP: 0px
}
FIELDSET FIELDSET {
MARGIN: 5px
}
BUTTON {
MARGIN-LEFT: 5px
}
TEXTAREA {
WIDTH: 100%; HEIGHT: 200px
}
#out {
BORDER-RIGHT: threeddarkshadow 1px solid; PADDING-RIGHT: 3px; BORDER-TOP: threeddarkshadow 1px solid; MARGIN-TOP: 5px; PADDING-LEFT: 3px; BACKGROUND: white; PADDING-BOTTOM: 3px; BORDER-LEFT: threeddarkshadow 1px solid; COLOR: black; PADDING-TOP: 3px; BORDER-BOTTOM: threeddarkshadow 1px solid; FONT-FAMILY: Verdana
}
#srcTextContainer {
DISPLAY: none
}
.element {
PADDING-LEFT: 16px; COLOR: blue
}
.elementname {
COLOR: darkred
}
.attribname {
COLOR: red
}
.attribvalue {
COLOR: blue
}
.text {
PADDING-LEFT: 16px; COLOR: windowtext
}
.cdata-content {
DISPLAY: block; PADDING-LEFT: 16px; BORDER-LEFT: gray 1px solid; COLOR: windowtext; FONT-FAMILY: Courier New; WHITE-SPACE: pre
}
.comment {
PADDING-LEFT: 16px; COLOR: blue
}
.doctype {
PADDING-LEFT: 16px; COLOR: blue
}
.comment-content {
DISPLAY: block; COLOR: gray; FONT-FAMILY: Courier New; WHITE-SPACE: pre
}
#XMLDebug {
BORDER-RIGHT: #000 1px solid; PADDING-RIGHT: 4px; BORDER-TOP: #000 1px solid; MARGIN-TOP: 6px; PADDING-LEFT: 4px; FONT-SIZE: 12px; BACKGROUND: #fff; PADDING-BOTTOM: 4px; OVERFLOW: auto; BORDER-LEFT: #000 1px solid; PADDING-TOP: 4px; BORDER-BOTTOM: #000 1px solid; HEIGHT: 400px
}

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