document.getElementById('btnid').disabled is not working in firefox and chrome

Question

I\'m using JavaScript for disabling a button. Works fine in IE but not in FireFox and chrome, here is the script what I\'m working on:

function disbtn(e) { 
         


        

Answer 1

use setAttribute() and removeAttribute()

function disbtn(e) { 
    if ( someCondition == true ) {
       document.getElementById('btn1').setAttribute("disabled","disabled");
    } else {
       document.getElementById('btn1').removeAttribute("disabled");
    }
}

SEE DEMO