How to calculate div height with definition of 'height = auto'

Question

I need to calculate the height of this div with Javascript.

When I wrote this script:

function getMainDivHeight() {
    var num = document.getElementById('up_container').style.height;
    return num;
}

this script returns auto

I need the height of the div after changing it.

Thank!!

+3

Jacob May 02, '11 at 19:31

1 answer

mVChr · Accepted Answer · 2011-05-02T19:33:40+0000

You need to get the property offsetHeight:

function getMainDivHeight() { 
 var num = document.getElementById('up_container').offsetHeight; 
 return num; 
}