黑白照片

HTML

<img src="img/1.jpg" alt="" /> <img src="img/1.jpg" alt="" class="gray"/>

					    

CSS

img {
    width: 200px;
    height: 150px;
}
/*  .gray{*/
/*  filter:gray;*/
/*  -webkit-filter: grayscale(100%);*/
/*  }*/

					    

JS

window.onload =function (){
	var oimg=document.getElementsByTagName('img')[1];
	grayscale(oimg);
}