I wrote a method that returns the actual values, that calls "getRowDataFromEditMode". You should paste it in jquery.jqGrid.src.js.

getRowDataFromEditMode: function(rowid) {

var success = false;

var $t = this[0], nm, tmp = {}, tmp2 = {}, tmp3 = {}, editable, fr, cv, ind;

if (!$t.grid) { return success; }

ind = $($t).jqGrid("getInd", rowid, true);

if (ind === false) { return success; }

editable = $(ind).attr("editable");

if (editable === "1") {

var cm;

$('td[role="gridcell"]', ind).each(function(i) {

cm = $t.p.colModel[i];

nm = cm.name;

if (nm != 'cb' && nm != 'subgrid' && cm.editable === true && nm != 'rn' && !$(this).hasClass('not-editable-cell')) {

switch (cm.edittype) {

case "checkbox":

var cbv = ["Yes", "No"];

if (cm.editoptions) {

cbv = cm.editoptions.value.split(":");

}

tmp[nm] = $("input", this).is(":checked") ? cbv[0] : cbv[1];

break;

case 'text':

case 'password':

case 'textarea':

case "button":

tmp[nm] = $("input, textarea", this).val();

break;

case 'select':

if (!cm.editoptions.multiple) {

tmp[nm] = $("select option:selected", this).val();

tmp2[nm] = $("select option:selected", this).text();

} else {

var sel = $("select", this), selectedText = [];

tmp[nm] = $(sel).val();

if (tmp[nm]) { tmp[nm] = tmp[nm].join(","); } else { tmp[nm] = ""; }

$("select option:selected", this).each(

function(i, selected) {

selectedText[i] = $(selected).text();

}

);

tmp2[nm] = selectedText.join(",");

}

if (cm.formatter && cm.formatter == 'select') { tmp2 = {}; }

break;

case 'custom':

try {

if (cm.editoptions && $.isFunction(cm.editoptions.custom_value)) {

tmp[nm] = cm.editoptions.custom_value.call($t, $(".customelement", this), 'get');

if (tmp[nm] === undefined) { throw "e2"; }

} else { throw "e1"; }

} catch (e) {

if (e == "e1") { $.jgrid.info_dialog($.jgrid.errors.errcap, "function 'custom_value' " + $.jgrid.edit.msg.nodefined, $.jgrid.edit.bClose); }

if (e == "e2") { $.jgrid.info_dialog($.jgrid.errors.errcap, "function 'custom_value' " + $.jgrid.edit.msg.novalue, $.jgrid.edit.bClose); }

else { $.jgrid.info_dialog($.jgrid.errors.errcap, e.message, $.jgrid.edit.bClose); }

}

break;

}

cv = $.jgrid.checkValues(tmp[nm], i, $t);

if (cv[0] === false) {

cv[1] = tmp[nm] + " " + cv[1];

return false;

}

if ($t.p.autoencode) { tmp[nm] = $.jgrid.htmlEncode(tmp[nm]); }

}

});

}

return tmp;

}