js代码

//document.documentElement.style.overflow='hidden';

document.body.style.overflow='hidden';

zymedia('video',{autoplay: true});

var screenheight = window.screen.height/2;

$("#modelView").width(window.screen.width);

$("#modelView").height(window.screen.height);

var videoheight = $(".zy_media").height()/2;

var padding_top = screenheight-videoheight;

$(".playvideo").css({"top":padding_top});

$("#modelView").css({"margin-top":-1*(padding_top+$(".zy_media").height())});