<script language="JavaScript">
    function toggleVisibility(me)...{
        if (me.style.visibility=="hidden")...{
            me.style.visibility="visible";
            }
        else ...{
            me.style.visibility="hidden";
            }
        }
</script>

<div onclick="toggleVisibility(this)" style="position:relative">
This example displays text that toggles between a visibility of 'visible' and 'hidden'. 
Note the behavior of the next line.</div><div>This second line shouldn't
move, since visibility retains its position in the flow</div>

<script language="JavaScript">
    function toggleVisibility(me){
        if (me.style.visibility=="hidden"){
            me.style.visibility="visible";
            }
        else{
            me.style.visibility="hidden";
            }
        }
</script>
<div onclick="toggleVisibility(this)" style="position:relative">
This example displays text that toggles between a visibility of 'visible' and 'hidden'. 
Note the behavior of the next line.</div><div>This second line shouldn't
move, since visibility retains its position in the flow</div>

        注意当一个元素被隐藏时，不能接受任何事件，因此上例中当<div>被隐藏后，不能再接受鼠标点击事件，所以再点击该控件位置不能再次显示控件。Display属性的作用则有所不同，visibility隐藏元素，但是却为该元素预留位置，而display实际是设置该元素的属性。例如任何display设置为block的元素都被视为一个单独的块儿，这时的<SPAN>会象<DIV>一样工作，而当display属性设置为inline时该元素将变成一个单列的元素，这时的<DIV>也会象<SPAN>一样工作。最后，如果一个元素的display属性被设置为none，那么这个元素实际上将彻底从输出流中去除，并且其后的所有元素将提到前面对的位置。

<script language="JavaScript">
    function toggleDisplay(me)...{
        if (me.style.display=="block")...{
            me.style.display="inline";
            alert("Text is now 'inline'.");
            }
        else ...{
            if (me.style.display=="inline")...{
                me.style.display="none";
                alert("Text is now 'none'. It will reappear in three seconds.");
                window.setTimeout("blueText.style.display='block';",3000,"JavaScript");
                }
            else ...{
                me.style.display="block";
                alert("Text is now 'block'.");
                }
            }
        }
</script>
 
<div>Click on the <span id="blueText" onclick="toggleDisplay(this)" 
style="color:blue;position:relative;cursor:hand;">blue text</span> to 
see how it affects the flow.</div>