标准AJAX请求DEMO

$.ajax({
	type: 'POST',url: 'index.PHP',data: {
		'ajax' : '1','action' : $('#action').val()
	},async: true,cache: false,dataType: 'html',beforeSend: function(data)
	{
		$('#div').html('正在操作...');
	},success: function(data)
	{
		$('#div').html(data);
	},complete : function(data)
	{
		alert(data);
	},error: function(XMLHttpRequest,textStatus,errorThrown)
	{
		alert("TECHNICAL ERROR.\n\ntextStatus: '" + textStatus + "'\nerrorThrown: '" + errorThrown + "'\nresponseText:\n" + XMLHttpRequest.responseText);
	}
});