how do you resolve 'options' is null or not an object in Internet Explorer?

if(typeof(window.external) != 'undefined'){

//yes, this is evil browser sniffing, but only IE has this bug

document.getElementsByName = function(name, tag){
if(!tag){
tag = '*';
}
var elems = document.getElementsByTagName(tag);
var res = []
for(var i=0;i<elems.length;i++){
att = elems[i].getAttribute('name');
if(att == name) {
res.push(elems[i]);
}
}
return res;
}

}

its from msdn forums
ps. tag is optional for this method, it will default to wildcard * if not specified (meaning it will check all elements in the document for given name)

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