和老师一样的，clientHeight获取图片可视高度，为什么获取到的是整张的高度，效果就成这样了
function SetimgHeight(){
var pictures = g('.picture');
for (var i = 0; i < pictures.length; i++) {
pictures[i].style.marginTop = (-1*pictures[i].clientHeight/2)+'px';
}
}
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function SetimgHeight(){
var pictures = g('.picture');
for (var i = 0; i < pictures.length; i++) {
pictures[i].style.marginTop = (-1*pictures[i].clientHeight/2)+'px';
}
}
2017-03-10
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