用&nbsp;Javascript 获取指定页面元素的位置是一个非常常见的需求,本文介绍的方法能够准确返回一个元素相对于整个文档左上角的坐标,即元素的&nbsp;top 、left 的位置,而且能够兼容浏览器,相信对新手非常有用。<br />

第二种方法:
function WebForm_GetElementPosition(element) {
var result = new Object();
result.x = 0;
result.y = 0;
result.width = 0;
result.height = 0;
if (element.offsetParent) {
result.x = element.offsetLeft;
result.y = element.offsetTop;
var parent = element.offsetParent;
while (parent) {
result.x += parent.offsetLeft;
result.y += parent.offsetTop;
var parentTagName = parent.tagName.toLowerCase();
if (parentTagName != “table” &&
parentTagName != “body” &&
parentTagName != “html” &&
parentTagName != “div” &&
parent.clientTop &&
parent.clientLeft) {
result.x += parent.clientLeft;
result.y += parent.clientTop;
}
parent = parent.offsetParent;
}
}
else if (element.left && element.top) {
result.x = element.left;
result.y = element.top;
}
else {
if (element.x) {
result.x = element.x;
}
if (element.y) {
result.y = element.y;
}
}
if (element.offsetWidth && element.offsetHeight) {
result.width = element.offsetWidth;
result.height = element.offsetHeight;
}
else if (element.style && element.style.pixelWidth && element.style.pixelHeight) {
result.width = element.style.pixelWidth;
result.height = element.style.pixelHeight;
}
return result;
}

Leave a Reply

电子邮件地址不会被公开。 必填项已用*标注