Dynamic Object Identification Mechanism - Help Required

In application, drop down will become list if drop down is having more values.


Note: Drop down or List which we know in the standard application here is not the same, Select can't be used, its inside a div.


ID, Class, others all are differing from one account to another account


Dropdown:
input id="inpt_entity2" class="dropdownInput textbox" type="text" contenteditable="false" role="combobox"  value=" " name="inpt_entity" title="" style="width: 280px; background-color: rgb(255, 255, 255);"
 
List:

input id="entity_display" class="inputreq rtpadding" type="text" previousvalue="XXXXX"  name="entity_display" value="" style="width: 280px; color: rgb(0, 0, 0);"
 title="xxxx"/>

Now in a page there are several same fields available and we dont know when will it come as what dropdown / list?

How to make it identify so that it will work in any kind of circumstances.