function ShowLayer()
{
document.Form1.Layer2.style.display="none";
}<IMG height="29" src="images/BBS_lt_xgyz.gif" width="127" border="0" onclick="ShowLayer()">
{
document.Form1.Layer2.style.display="none";
}<IMG height="29" src="images/BBS_lt_xgyz.gif" width="127" border="0" onclick="ShowLayer()">
{
alert(document.Form1)
alert(document.Form1.Layer2)
alert(document.Form1.Layer2.style)
alert(document.Form1.Layer2.style.display)
document.Form1.Layer2.style.display="none";
}
看看那个是null或者undefined
document.Form1.Layer2style.visibility='hidden';
document.Form1.Layer2.style.visibility='hidden';
[object]
undefined错在哪了,怎么改?