ECMA Script : To delete a SharePoint 2010 list

<script language="ecmascript" type="text/ecmascript">       var clientContext = null;     var oWeb = null;     var oListColl = null;     var oList = null;       function deleteList() {           clientContext = new SP.ClientContext.get_current()         oWeb = clientContext.get_web();         oListColl = oWeb.get_lists();         oList = oListColl.getByTitle('List1');         oList.deleteObject();         clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded), Function.createDelegate(this, this.onQueryFailed));     }       function onQuerySucceeded() {                alert("List deleted successfully");     }       function onQueryFailed(sender, args) {         alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());     }   </script> <input id="btndeleteList" onclick="deleteList()" type="button" value="Delete the list"/>