$(document).ready(
function()  
{
    $("input").each (function() 
    {
        if($(this).attr("id").indexOf("txtProd") != -1) 
        {
           $(this).autocomplete("getvariants.aspx", 
           {
            delay:1000,
            width: 275,
            minChars:1,
            matchSubset:0,
            autoFill:false,
            matchContains:1,
            selectFirst:false,
            scroll: false,
            maxItemsToShow:20
            }
          );       
        }
    }); 
});