p.style.position = "absolute"
p.style.left="100px"
p.style.top="100px"
js获取DIV的位置坐标的方法有三种，分别如下：方法一：
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var odiv=document.getElementByIdx_x('divid')
alert(odiv.getBoundingClientRect().left)
alert(odiv.getBoundingClientRect().top)
方法二：
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function CPos(x, y)
{
this.x = x
this.y = y
}
function GetObjPos(ATarget)
{
var target = ATarget
var pos = new CPos(target.offsetLeft, target.offsetTop)
var target = target.offsetParent
while (target)
{
pos.x += target.offsetLeft
pos.y += target.offsetTop
target = target.offsetParent
}
return pos
}
var obj = document.getElementByIdx_x('divid')
alert(GetObjPos(obj)['x']) //x坐标
alert(GetObjPos(obj)['y']) //y坐标
方法三：
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function getElementPos(elementId){
var ua = navigator.userAgent.toLowerCase()
var isOpera = (ua.indexOf('opera') != -1)
var isIE = (ua.indexOf('msie') != -1 &&!isOpera)// not opera spoof
var el = document.getElementByIdx_x(elementId)
if (el.parentNode === null || el.style.display == 'none') {
return false
}
var parent = null
var pos = []
var box
if (el.getBoundingClientRect) //IE
{
box = el.getBoundingClientRect()
var scrollTop = Math.max(document.documentElement.scrollTop, document.body.scrollTop)
var scrollLeft = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft)
return {
x: box.left + scrollLeft,
y: box.top + scrollTop
}
}
else
if (document.getBoxObjectFor) // gecko
{
box = document.getBoxObjectFor(el)
var borderLeft = (el.style.borderLeftWidth) ? parseInt(el.style.borderLeftWidth) : 0
var borderTop = (el.style.borderTopWidth) ? parseInt(el.style.borderTopWidth) : 0
pos = [box.x - borderLeft, box.y - borderTop]
}
else // safari &opera
{
pos = [el.offsetLeft, el.offsetTop]
parent = el.offsetParent
if (parent != el) {
while (parent) {
pos[0] += parent.offsetLeft
pos[1] += parent.offsetTop
parent = parent.offsetParent
}
}
if (ua.indexOf('opera') != -1 || (ua.indexOf('safari') != -1 &&el.style.position == 'absolute'))
{
pos[0] -= document.body.offsetLeft
pos[1] -= document.body.offsetTop
}
}
if (el.parentNode) {
parent = el.parentNode
}
else {
parent = null
}
while (parent &&parent.tagName != 'BODY' &&parent.tagName != 'HTML') { // account for any scrolled
ancestors
pos[0] -= parent.scrollLeft
pos[1] -= parent.scrollTop
if (parent.parentNode) {
parent = parent.parentNode
}
else {
parent = null
}
}
return {
x: pos[0],
y: pos[1]
}
}
var xd = getElementPos("divid")
alert(xd.x)
alert(xd.y)
