从grid中一次删除多条数据

/**
* 删除自定义字段
*/
var setting_customfields_handleDelete = function() {
var selectedKeys = setting_customfieldslist_grid.selModel.selections.keys;
if (selectedKeys.length > 0) {
var select = setting_customfieldslist_grid.getSelections();
for (var i = 0; i < select.length; i++) {
setting_customfieldslist_del_count++;
}
Ext.MessageBox.confirm(local_customfield_tips, local_customfield_confirmDelete, setting_customfieldslist_deleteRecord);

} else {
Ext.MessageBox.alert(local_customfield_tips, local_customfield_selectAtleastOneRecord);
}
}
/**
* 删除自定义字段记录
*/
function setting_customfieldslist_deleteRecord(btn) {
if (btn == 'yes') {
var flagdele = true;
var selectedRecords=setting_customfieldslist_grid.getSelections();
var ids=new Array();
var index;
for (var i = 0; i < selectedRecords.length; i++) {
ids.push(selectedRecords[i].get('ID'));
}
ids=ids.toString();
Ext.Ajax.request({
url : 'BLL/ModuleSystem/Setting/CustomField/Operation.aspx?cmd=delCustomFields&rand=' + Math.round(Math.random() * (10000 - 1)).toString(),
method : 'POST',
params : {
ids : ids
},
failure : function(response, options) {
Ext.MessageBox.hide();
Ext.MessageBox.alert(local_customfield_warn, local_customfield_ContactAdmin);
},
success : function(response, options) {
if (response.responseText != "OK") {
Ext.MessageBox.alert(local_customfield_tips, local_customfield_haveDeleteForbidRecord);
} else {
Ext.MessageBox.alert(local_customfield_tips, local_customfield_deleteSuccess);
setting_customfieldslist_store.reload();
}
}
});
}
}