Javascript – Validating input

function Validate(txt) {

txt.value = txt.value.replace(/[^a-zA-Z 0-9\n\r]+/g, ”);

}

<td><textarea rows=”2″ name=_CANCOMMENT’ + item.quest_id + ‘ id=_CANCOMMENT’ + item.quest_id + ‘ onkeyup = “Validate(this)” ‘ + ‘ onblur = “updateDetail(‘ + item.quest_id + ‘,’ + item._ACTUALPOINTS + ‘)” ‘ + ‘” class=”input-field control form-control” style=”width:400px”>’ + item._CANCOMMENT + ‘</textarea> </td>