jquery弹窗

$(function(){

//初始化

var win_w = $(window).width;

var win_h = $(window).height;

//获取弹窗的宽高

var tc_w = $('#tc').width();

var tc_h = $('#tc').height();

//居中显示

tc_l = (win_w-tc_w)/2;

tc_t = (win_h-tc_h)/2;

$('#tc').css({top:tc_t,left:tc_l});

});