yjiang's cake

$.ajax({
		type		:	"POST",
		url			:	postUrl,
		data		:	data,
		beforeSend	:	function(){
			$('.'+type+'_watting').show();
			errMsg.text(' 正在绑定..');
		},
		success		:	function(result){
			console.log(result);
			$('.'+type+'_watting').hide();
			errMsg.text(result.err_msg);
			if (result.result == 'false'){
				$("#con_submit").hide();
			}
			else{
				$("#con_submit").show();
			}
		}
	});

beforeSend属性可实现此效果