js实现加载中效果

注意把async改为true即可

$.ajax({
	url: '#',
	type: 'post',
	async: true,
	contentType: "application/json",
	beforeSend: function(){
    	$("
").css({ display: "block", width: "100%", height: $(window).height() }).appendTo("body");
    	$("
").html("正在运行,请稍候...").appendTo("body").css({ display: "block", left: ($(document.body).outerWidth(true) - 190) / 2, top: ($(window).height() - 45) / 2 });
	},
	complete: function(){
    	$(".datagrid-mask").remove();
    	$(".datagrid-mask-msg").remove();
	},
	success: function (data) {
   		alert("执行成功");
    }
})