我们需要给某个TABLE加上鼠标事件的时候,一般希望当鼠标滑在整个TABLE之上的时候做某些处理,当鼠标滑出TABLE的时候做另外的处理. 一般情况下你会用onmouseover和onmouseout,代码如下:
<TABLE border="1" width=200 onmouseover="alert('鼠标滑进')" onmouseout="alert('鼠标滑出')"> <TR> <TD id="TD1" noWrap height=25 onmouseenter="this.style.color='red'"> 菜单1</TD> </TR> <tr> <TD id="TD2" noWrap height=25 onmouseenter="this.style.color='red'"> 菜单2</TD> </TR> <TR> <TD id="TD3" noWrap height=25 onmouseenter="this.style.color='red'"> 菜单3</TD> </TR> </TABLE>
按常理说:当鼠标进入table的时候就会弹出"鼠标滑进",当鼠标离开table的时候就会弹出"鼠标滑出"
但事实情况却是会不停地弹出"鼠标滑进""鼠标滑出",因为鼠标在TD之间滑动时也会触发TABLE的onmouseover和onmouseout事件。
如果是在IE下,则可以换用onmouseenter和onmouseleave来解决,示例代码如下:
<TABLE border="1" width=200 onmouseenter="alert('鼠标滑进')" onmouseleave="alert('鼠标滑出')"> <TR> <TD id="TD1" noWrap height=25 onmouseenter="this.style.color='red'"> 菜单1</TD> </TR> <tr> <TD id="TD2" noWrap height=25 onmouseenter="this.style.color='red'"> 菜单2</TD> </TR> <TR> <TD id="TD3" noWrap height=25 onmouseenter="this.style.color='red'"> 菜单3</TD> </TR> </TABLE>
如果是其他浏览器,则需要判断鼠标指针的坐标是否处于TABLE之外.示例代码如下(网上搜集):
<style type="text/css">... html, body {...}{ padding:0px; margin:0px; } </style><br/> <br/> <br/> <br/> <br/> <br/> <br/> <table id="ta" width="350" border="0" cellspacing="0" cellpadding="0"> <tr> <td bgcolor="#996633"> </td> <td bgcolor="#234633"><button > Clos</button></td> <td bgcolor="#0000FF"> </td> </tr> </table> <script type="text/javascript">... var rePosition = function (o) ...{ //获取元素绝对位置 var $x = $y = 0; do ...{ $x += o.offsetLeft; $y += o.offsetTop; } while ((oo = o.offsetParent) && o.tagName != "BODY"); return ...{ x : $x, y : $y }; }; window.onload = function () ...{ var wc = document.getElementById("ta"), ing = false; wc.onmouseover = function () ...{ if (!ing) ...{ ing = true; alert("over"); } }; wc.onmouseout = function () ...{ var wc = this, e = window.event || e, x = document.body.scrollLeft + e.clientX, y = document.body.scrollTop + e.clientY, p = rePosition(wc); //alert(y); if (x <= p.x || x >= (p.x + wc.offsetWidth) || y <= p.y || y >= (p.y + wc.offsetHeight)) ...{ alert("out"); ing = false; } }; }; </script>
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