filterInput jQuery
A jQuery object of the filter input element, where the user types.
Available only if the filtering is enabled.
Example - get input element
<input id="dropdownlist" />
<script>
$("#dropdownlist").kendoDropDownList({
filter:"startswith",
dataSource:["Chai", "Chang","Tofu"]
});
var dropdownlist = $("#dropdownlist").data("kendoDropDownList");
var filterInput = dropdownlist.filterInput;
</script>