XML DOM firstChild 属性

//check if the first node is an element node
function get_firstchild(n)
{
x=n.firstChild;
while (x.nodeType!=1)
{
x=x.nextSibling;
}
return x;
}

xmlDoc=loadXMLDoc("books.xml");

x=xmlDoc.documentElement;
firstNode=get_firstchild(x);

for (i=0;i<firstNode.childNodes.length;i++)
{
if (firstNode.childNodes[i].nodeType==1)
{
//Process only element nodes
document.write(firstNode.childNodes[i].nodeName);
document.write(" = ");
document.write(firstNode.childNodes[i].childNodes[0].nodeValue);
document.write("
");
}
}

title = Everyday Italian
author = Giada De Laurentiis
year = 2005
price = 30.00