Manipulating SharePoint Lookup Field values using Javascript

This article gives an small trick for manipulating the values of SharePoint Lookup Field (OOB control for list item lookup). For one of my assignments I was required to manipulate the values listed into SharePoint Lookup Field so I did it in this fashion

function getField(fieldType,fieldTitle)
{
var docTags = document.getElementsByTagName(fieldType);
for (var i=0; i < docTags.length; i++)
{
if (docTags[i].title == fieldTitle)
{
docTags[i].readOnly = true;
docTags[i].setAttribute(“choices”,”Comment 1|20″);
}
}
return false;
}
getField(‘input’,'Comment Type’);

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