JavaScript基于ajax编辑信息用法实例

// Requires prototype.js function edit(action, obj) { Element.hide(obj); var textarea ='<div><input type="text" value="' + obj.innerHTML + '" size="40">'; var button = '<input type="button" value="SAVE" /> <input type="button" value="CANCEL" /></div>'; new Insertion.After(obj, textarea+button); Event.observe(obj.id+'_save', 'click', function(){saveChanges(action, obj)}, false); Event.observe(obj.id+'_cancel', 'click', function(){cleanUp(obj)}, false); $(obj.id+"_edit").focus(); $(obj.id+"_edit").select(); } function cleanUp(obj, keepEditable) { Element.remove(obj.id+'_editor'); Element.show(obj); if(!keepEditable) showAsEditable(obj, true); } function saveChanges(action, obj) { var new_content = escape($F(obj.id+'_edit')); obj.innerHTML = "Saving..."; cleanUp(obj, true); var success = function(t){editComplete(t, obj);} var failure = function(t){editFailed(t, obj);} var url = 'poll-ajax.php?a='+action; var pars = 'id=' + obj.id + '&content=' + new_content; var myAjax = new Ajax.Request(url, {method:'post', postBody:pars, onSuccess:success, onFailure:failure}); } function editComplete(t, obj) { obj.innerHTML = t.responseText; showAsEditable(obj, true); } function editFailed(t, obj) { obj.innerHTML = 'Sorry, the update failed.'; cleanUp(obj); }