Selects an item that the value of the value attribute is same as the assigned value.
selectInstance.Value = attributeValue
|string||attributeValue||Value of value attribute of item to be selected.|
// anySelect is an instance of select class.
anySelect.Value = "Attribute value";
If an item has an assignment value as a value attribute, that item is selected.
If there is no assigned value as a value attribute, it will be in a non-selected state.
Links for reference