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When I run this, I get "oldSelected2" is undefined. This seems to work in IE, but not Chrome. The problem seems to be with the oldSelected.children[findSelected(selectReplace)]. I leave the drop down menu where selectReplace = 0, so a 0 goes into the oldSelected.children[], however when this runs, it returns undefined. It returns undefined for any number put into it. However, in IE, instead of undefined, it returns the object, and everything works fine. Is there anything in my findSelected function at the bottom that can cause this to break?

var selectReplace = document.getElementById(colName + index)
oldSelected = selectReplace.children[1];
oldSelected2 = oldSelected.children[findSelected(selectReplace)]

oldSelected2.removeAttribute("selected");
el = oldSelected.children[baseSiteIx.selectedIndex + 1];
el.setAttribute("selected", 1);
selectReplace.selectedIndex = findSelected(baseSiteIx) + 1;

Heres the xsl

    <script type="text/javascript">
    var siteArray = new Array();
    siteArray[0] = new Option("007", "3135", "font-family:Verdana;font-size:12px;","selected");siteArray[1] = new Option("081730", "3287", "font-family:Verdana;font-size:12px;");siteArray[2] = new Option("11", "3226", "font-family:Verdana;font-size:12px;");siteArray[3] = new Option("12", "3327", "font-family:Verdana;font-size:12px;");siteArray[4] = new Option("13", "73", "font-family:Verdana;font-size:12px;");siteArray[5] = new Option("13&", "3194", "font-family:Verdana;font-size:12px;");siteArray[6] = new Option("14", "1113", "font-family:Verdana;font-size:12px;");siteArray[7] = new Option("140", "3347", "font-family:Verdana;font-size:12px;");siteArray[8] = new Option("15", "3387", "font-family:Verdana;font-size:12px;");siteArray[9] = new Option("16", "3407", "font-family:Verdana;font-size:12px;");siteArray[10] = new Option("2001", "3487", "font-family:Verdana;font-size:12px;");siteArray[11] = new Option("2002", "3488", "font-family:Verdana;font-size:12px;");siteArray[12] = new Option("32", "3225", "font-family:Verdana;font-size:12px;");siteArray[13] = new Option("400", "3224", "font-family:Verdana;font-size:12px;");siteArray[14] = new Option("402", "3221", "font-family:Verdana;font-size:12px;");siteArray[15] = new Option("403", "3280", "font-family:Verdana;font-size:12px;");siteArray[16] = new Option("41", "3328", "font-family:Verdana;font-size:12px;");siteArray[17] = new Option("604", "3527", "font-family:Verdana;font-size:12px;");siteArray[18] = new Option("605", "3202", "font-family:Verdana;font-size:12px;");siteArray[19] = new Option("680", "3201", "font-family:Verdana;font-size:12px;");siteArray[20] = new Option("69", "3200", "font-family:Verdana;font-size:12px;");siteArray[21] = new Option("786104", "3253", "font-family:Verdana;font-size:12px;");siteArray[22] = new Option("87", "3254", "font-family:Verdana;font-size:12px;");siteArray[23] = new Option("A1A", "1153", "font-family:Verdana;font-size:12px;");siteArray[24] = new Option("ARG", "3103", "font-family:Verdana;font-size:12px;");siteArray[25] = new Option("AVK", "3281", "font-family:Verdana;font-size:12px;");siteArray[26] = new Option("AVNET", "3307", "font-family:Verdana;font-size:12px;");siteArray[27] = new Option("B1", "2533", "font-family:Verdana;font-size:12px;");siteArray[28] = new Option("BBY", "3447", "font-family:Verdana;font-size:12px;");siteArray[29] = new Option("D1", "2813", "font-family:Verdana;font-size:12px;");siteArray[30] = new Option("DAL", "3472", "font-family:Verdana;font-size:12px;");siteArray[31] = new Option("ECONTROLS", "3247", "font-family:Verdana;font-size:12px;");siteArray[32] = new Option("ECT", "3248", "font-family:Verdana;font-size:12px;");siteArray[33] = new Option("FL01", "3250", "font-family:Verdana;font-size:12px;");siteArray[34] = new Option("FL04", "3249", "font-family:Verdana;font-size:12px;");siteArray[35] = new Option("FWB", "3203", "font-family:Verdana;font-size:12px;");siteArray[36] = new Option("LEX", "3471", "font-family:Verdana;font-size:12px;");siteArray[37] = new Option("MAIN", "3134", "font-family:Verdana;font-size:12px;");siteArray[38] = new Option("MANKATO", "3219", "font-family:Verdana;font-size:12px;");siteArray[39] = new Option("MIL", "3474", "font-family:Verdana;font-size:12px;");siteArray[40] = new Option("MIS", "3468", "font-family:Verdana;font-size:12px;");siteArray[41] = new Option("PITT", "3256", "font-family:Verdana;font-size:12px;");siteArray[42] = new Option("RECEIPT", "3229", "font-family:Verdana;font-size:12px;");siteArray[43] = new Option("ST5678", "3260", "font-family:Verdana;font-size:12px;");siteArray[44] = new Option("STP", "3473", "font-family:Verdana;font-size:12px;");siteArray[45] = new Option("STPETER", "3218", "font-family:Verdana;font-size:12px;");siteArray[46] = new Option("TENN", "3257", "font-family:Verdana;font-size:12px;");siteArray[47] = new Option("TOR", "3470", "font-family:Verdana;font-size:12px;");siteArray[48] = new Option("VAN", "3467", "font-family:Verdana;font-size:12px;");siteArray[49] = new Option("VMI", "3252", "font-family:Verdana;font-size:12px;");siteArray[50] = new Option("WNJ", "3282", "font-family:Verdana;font-size:12px;");writeSelectBox(siteArray, "SiteIxFill", 1, "", "z-index:100; width: 110;");</script>

<select size="1" id="SiteIxFill" name="SiteIxFill" onchange="" style="z-index:100; width: 110;">
<option value="3468" style="font-family:Verdana;font-size:12px;">MIS</option>
<option value="3256" style="font-family:Verdana;font-size:12px;">PITT</option>
<option value="3229" style="font-family:Verdana;font-size:12px;">RECEIPT</option>
<option value="3260" style="font-family:Verdana;font-size:12px;">ST5678</option>
<option value="3473" style="font-family:Verdana;font-size:12px;">STP</option>
<option value="3218" style="font-family:Verdana;font-size:12px;">STPETER</option>
<option value="3257" style="font-family:Verdana;font-size:12px;">TENN</option>
<option value="3470" style="font-family:Verdana;font-size:12px;">TOR</option>
<option value="3467" style="font-family:Verdana;font-size:12px;">VAN</option>
<option value="3252" style="font-family:Verdana;font-size:12px;">VMI</option>
<option value="3282" style="font-family:Verdana;font-size:12px;">WNJ</option>
</select>

<input id="SiteIxFillStart" name="SiteIxFillStart" value="1" size="2">
<input id="SiteIxFillEnd" name="SiteIxFillEnd" value="1" size="2">
<input type="button" value="  Fill  " size="5" onclick="fillSelectBoxes('SiteIx');">

Here is the find selected 

function findSelected(el) {
var selected = null;


ec = el.children[1].children;   //the table is the first child
var ecl = ec.length;

for (var i=0; i<ecl; i++) {
    if (ec[i].getAttribute("selected") != null) {
        if (selected == null) { // Found first selected
            selected = i;
        }
        else
            ec[i].removeAttribute("selected");  //Like I said. Only one selected!
    }
}
if (selected == null)
    selected = 0;   //When starting this is the most logic start value if none is present

return selected;
}
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