Jquery入门小例子（节点的显示和隐藏）
function showwin(){
var winNode=$("#win");
//winNode.css("display","block");
//winNode.show("slow");
winNode.fadeIn("slow");
}
function close1(){
var winNode=$("#win");
// winNode.fadeOut("slow");
//winNode.hide("slow");
winNode.css("display","none")
}