Someone

 function setview(ViewID){var displayitem = document.getElementById('tabitems');var displayitems = displayitem.childNodes;var i = 0;        while(i <= displayitems.length){                tab = displayitems[i];                //alert(tab+' - '+tab.getAttribute('id')+' == '+ViewID);                if(tab.getAttribute('id') == ViewID){                //alert(tab+' - '+tab.getAttribute('id')+' == '+ViewID);                        tab.setAttribute('class', 'viewtab');                }else{                        tab.setAttribute('class', 'hidetab');                }                i++;        }}IE outputs:Error: tab is null of not an objectHTML is:<div id="tabitems"><div id="AccountDetails"></div><div id="ServiceDetails"></div></div>