Get and Set lookup value using javascript in CRM 2011

In this article , I am going to explain how to set and get CRM lookup attribute value using javascript

Get a lookup value

var lookup = new Array();

lookup = Xrm.Page.getAttribute(“attributename”).getValue();

if (lookup != null) {

    var name = lookup[0].name;

    var id = lookup[0].id;

    var entityType = lookup[0].entityType;

}

Set a lookup value

var lookup = new Array();

lookup[0] = new Object();

lookup[0].id = recorid;

lookup[0].name = recordname;

lookup[0].entityType = entityname;

Xrm.Page.getAttribute(“attributename”).setValue(lookup);

Alternate method to set lookup value

Xrm.Page.getAttribute(“attributename”).setValue([{ id: recorid, name: recordname, entityType: entityname}]);

Thanks.