打印网页
打印某个标签内的内容:
function customPrint( contentContainerId )
{
var contentContainer=document.getElementById(contentContainerId);
var winEx = window.open("about:blank","", "height=10,width=10","");
winEx.document.open("text/html", "replace");
winEx.document.write(contentContainer.innerHTML);
winEx.document.close();
winEx.print();
winEx.close();
}