<html>
<head>
<title>访问父元素和子元素</title>
<script language="JavaScript">
function showParentTag(){
alert(myP.parentElement.tagName);
}
function showChildsTag(){
var strTags = "";
for (var i=0; i<myP.children.length; i++){
objEle = myP.children.item(i);
strTags += objEle.tagName + " ";
}
alert(strTags);
}
function checkChild(){
var objEle = document.all("myP").children.item(1);
if (document.all("myP").contains(objEle))
alert("myP有子元素" + objEle.tagName);
else
alert("myP没有子元素" + objEle.tagName);
}
</script>
</head>
<body >
</form>
</body>
</html>