ajax new select options not working in IE

[mapleleaf]

I am using prototype

This is my function:

function getdropdown(str){
     var url="index.php/home/getSpecial/"
     url=url+str;
     var target = str.substr(6,1);
     
     var myAjax = new Ajax.Updater(target, url, {method: 'get'});
}

 

The target is a select tag.

It works perfectly in Firefox.

IE is showing up blank. No response seems to be coming.

Any ideas?