divcover.js
上传用户:wenllgg125
上传日期:2020-04-09
资源大小:7277k
文件大小:2k
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- //隐藏指定元素位置下方的"下拉列表框",该函数主题解决ie6以前(包括ie6)的下拉列表框遮挡显示层的问题
- function HideOverSels(objID)
- {
- var sels = document.getElementsByTagName('select');
-
- for (var i = 0; i < sels.length; i++)
- {
- if (Obj1OverObj2(document.getElementById(objID), sels[i]))
- {
-
- sels[i].style.visibility = 'hidden';
- }
- else
- {
- sels[i].style.visibility = 'visible';
- }
- }
- }
- function getLeftPosition(Obj)
- {
- try
- {
- for (var sumLeft=0;Obj!=document.body;sumLeft+=Obj.offsetLeft,Obj=Obj.offsetParent);
- return sumLeft;
- }
- catch(e)
- {}
- }
- function getTopPosition(Obj)
- {
- try
- {
- for (var sumTop=0;Obj!=document.body;sumTop+=Obj.offsetTop,Obj=Obj.offsetParent);
- return sumTop;
- }
- catch(e)
- {}
- }
- //判断obj1是否遮挡了obj2
- function Obj1OverObj2(obj1, obj2)
- {
- var result = true;
-
- var obj1Left = getLeftPosition(obj1) - document.body.scrollLeft;
- var obj1Top = getTopPosition(obj1) - document.body.scrollTop;
- var obj1Right = obj1Left + obj1.offsetWidth;
- var obj1Bottom = obj1Top + obj1.offsetHeight;
- var obj2Left = getLeftPosition(obj2) - document.body.scrollLeft;
- var obj2Top = getTopPosition(obj2) - document.body.scrollTop;
- var obj2Right = obj2Left + obj2.offsetWidth;
- var obj2Bottom = obj2Top + obj2.offsetHeight;
-
- if (obj1Right <= obj2Left || obj1Bottom <= obj2Top || obj1Left >= obj2Right || obj1Top >= obj2Bottom)
- {
- result = false;
- }
-
- return result;
- }