JavaScript gets the offset value code for the page element

JS acquisition method.

The code is as follows	Copy Code
document.getElementById ("Divfloat"). Style.top=document.getelementbyid ("button"). offsetleft+25;

With IETester and Firefox test, under the ie6+ can, as before, write the pure JS method mercilessly despised by Firefox, get the value is not correct.

On the internet again, found that should be so written, through the loop, layers upward calculation, and finally get the correct value of the offset.

JS gets the offset value of the Web page control method

The code is as follows

Copy Code

Colour Pallete Top Offset function Getoffsettop (Elm) { var moffsettop = elm.offsettop; var moffsetparent = elm.offsetparent; while (moffsetparent) { Moffsettop + = Moffsetparent.offsettop; Moffsetparent = moffsetparent.offsetparent; } return moffsettop; } Colour Pallete left Offset function Getoffsetleft (Elm) { var moffsetleft = Elm.offsetleft; var moffsetparent = elm.offsetparent; while (moffsetparent) { Moffsetleft + = Moffsetparent.offsetleft; Moffsetparent = moffsetparent.offsetparent; } return moffsetleft; } function Ie_y (e) { var t=e.offsettop; while (e=e.offsetparent) { T+=e.offsettop; } return t; } function Ie_x (e) { var l=e.offsetleft; while (e=e.offsetparent) { L+=e.offsetleft; } return l; }

the implementation of jquery

One more step to find out about the problem is that jquery already contains functions to implement this functionality: offset (), which is well compatible with browsers.

The code is as follows	Copy Code
$ ("#Button"). Offset (). Left

The individual prefers to use the jquery feature because the code is simple and straightforward and compatible.