htmlfile:Could not set the selected property.Unspecified error in javascript

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Javascript

dear sir,

"html file: Could not set the selected property. Unspecified error"

MY Code is,

function setSelectedIndex(s, v) {

           for (var i = 0; i < s.options.length; i++) {
               if (s.options[i].text == v) {
                   s.options[i].selected = true;
                   return;
               }
           }

But IE browswer can't supported. because error display. (other browsers are working well).
Note:
name : textbox
Address : textbox
City : Dropdown list
Area : Dropdown list ------------------>Error is here(editing time)

this error arise when I am editing customer details.