vendors module : related list does not load

[saidmsl]

have changed it in relateslistcontents.tpl

function loadRelatedListBlock


var responseData = trim(response.responseText);
// MSL : error on vendors
var n = target.indexOf("_");
var res = target.substring(n+1, 100);
var p = res.indexOf("_");
var module = target.substring(n+1, n+p+1);
if (module == 'Vendors') {
document.getElementById(target).innerHTML = responseData;
} else {
target_element.update(responseData);
}

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seems the target_element.update does not work on the vendors module, don't understand why