bt_up.style.display="none"; //隐藏
bt_up.style.display=""; //显示bt_up.style.visibility="visible";//显示
bt_up.style.visibility="hidden";//隐藏两者区别为,display的隐会不占原有的空间,而visibility设为hidden后,还是会占着茅坑不拉屎
bt_up.style.display=""; //显示bt_up.style.visibility="visible";//显示
bt_up.style.visibility="hidden";//隐藏两者区别为,display的隐会不占原有的空间,而visibility设为hidden后,还是会占着茅坑不拉屎
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<SCRIPT LANGUAGE="JavaScript">
<!--
function setHidden()
{
if (div1.style.display=="none")
{
div1.style.display = "block";
}
else
{
div1.style.display = "none";
}
}
//-->
</SCRIPT>
</HEAD><BODY>
<td align="right"><strong id="shang"></strong><a href="#" onclick="ChangePage(-1);imgPush1('bt_up','bt_up');">
<div id="div1" style="visibility:visable"><img src="../img/bt_up_of.gif" width="54" height="96" border="0" name="bt_up" alt=""></div></a></td>
<input type="button" value ="setHidden" onclick="setHidden()">
</BODY>
</HTML>