业务开发过程中，为了避免用户的误操作，提示框是必要的，于是琢磨出了下面这个使用，方便的提示框

还要引入遮罩层的样式如下：

/*弹出层*/
.input{height: 32px;border: 1px solid #ccc;border-radius:1px;width:240px;}
.layer_icon{ background:url(../images/b_layer.png) no-repeat; display:inline-block;}
.w460{width: 460px;}
/*弹出通用样式*/
.b_l{border-radius:4px; box-shadow:1px 2px 4px #6c6e72;-moz-box-shadow:1px 2px 4px #6c6e72;-webkit-box-shadow:1px 2px 4px #6c6e72;background:#fff;position:fixed;z-index:10}

使用方法： tm_dialog(options)

function tm_dialoag(options){
var defaults = {
title:"提示",
content:"请输入内容 ！",
width:460,
height:220,
sureText:"确定",
cancleText:"取消",
showButton:true,
callback:function(){}
};
var opts = $.extend({},defaults,options);
//初始化拖拽

$("body").append("<div class='b_l w460 popanimate' id='dialogbox'>"+
" <div class='bcom_ti'>"+
" <a href='javascript:void(0);' class='bide layer_icon close fr'></a> <span>"+opts.title+"</span>"+
" </div>"+
" <div class='bcom_cent'>"+
" <p class='bcomti'>"+opts.content+"</p>"+
" <p class='bcoma'>"+
" <a href='javascript:void(0);' class='bc_abut1 sure'>"+opts.sureText+"</a>"+
" <a href='javascript:void(0);' class='bc_abut2 close'>"+opts.cancleText+"</a>"+
" </p>"+
" </div>"+
"</div>").append("<div class='tmui-overlay' style='height:"+$(window).height()+"px'></div>");

$("#dialogbox").tmDrag({"handle":".bcom_ti"});
var $dialog = $("#dialogbox");
if(!opts.showButton)$dialog.find(".bcoma").remove();
var contentHeight = opts.height-200;
$dialog.find(".bcomti").css({"height":contentHeight,"lineHeight":contentHeight+"px"});
$dialog.width(opts.width);
$dialog.height(opts.height);
tm_center_dialog($dialog);

//关闭按钮绑定点击事件
$dialog.find(".close").click(function(){
$dialog.next().remove();//删除遮罩层
$dialog.slideUp("slow",function(){
$(this).remove();
});
if(opts.callback)opts.callback(false);
});
$dialog.find(".sure").click(function(){
$dialog.next().remove();//删除遮罩层
$dialog.slideUp("slow",function(){
$(this).remove();
});
if(opts.callback)opts.callback(true);
});
//窗口resize
$(window).resize(function(){
tm_center_dialog($dialog);
});
};

//层居中
function tm_center_dialog($dialog){
var windowWidth = $(window).width();
var windowHeight = getClientHeight();
var dialogWidth = $dialog.width();
var dialogHeight = $dialog.height();
var left = (windowWidth-dialogWidth)/2;
var top = (windowHeight-dialogHeight)/2;
$dialog.css({left:left,top:top});
};

function getClientHeight() {
var clientHeight = 0;
if (document.body.clientHeight && document.documentElement.clientHeight) {
clientHeight = (document.body.clientHeight < document.documentElement.clientHeight) ? document.body.clientHeight
: document.documentElement.clientHeight;
} else {
clientHeight = (document.body.clientHeight > document.documentElement.clientHeight) ? document.body.clientHeight
: document.documentElement.clientHeight;
}
return clientHeight;
};