Detailed explanation of img tag and changing image size in html (picture)-HTML Tutorial-php.cn

Detailed explanation of img tag and changing image size in html (picture)

黄舟

Release： 2017-07-26 13:31:23

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1. Uniform size?

There are many pictures on my webpage, some are large and some are small. I think if the pictures are zoomed in, all of them will be the same size. Let's see what the effect is.

Everyone can see that it is very ugly, so I wonder if there is a way to change the big one into a small one?

<li><img src=&#39;http://pic2.ooopic.com/01/03/51/25b1OOOPIC19.jpg&#39; width=400px height=400px /></li>

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The rendering is as follows:

But what if the picture is too small? It will be enlarged, so ugly! ! ! Is there any way to make the big ones smaller without making the small ones bigger?

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>食物详情</title>

  </head>
  <body>
  	
  	<ul>
		<li><img name="pic" src=&#39;http://pic2.ooopic.com/01/03/51/25b1OOOPIC19.jpg&#39; /></li>
		<li><img name="pic" src=&#39;http://baike.soso.com/p/20090711/20090711101754-314944703.jpg&#39; /></li>
		<li><img name="pic" src=&#39;http://img2.3lian.com/img2007/19/33/005.jpg&#39; /></li>
		<li><img name="pic" src=&#39;http://img.taopic.com/uploads/allimg/130501/240451-13050106450911.jpg&#39; /></li>
		<script type="text/javascript">
		function setImg(w, h){
			alert("111");
		    //var imgList = document.getElementsByTagName(&#39;img&#39;);
		    var imgList = document.getElementsByName("pic");
		    for(var i=0;i<imgList.length;i++){
		    	alert("222");
		        if(imgList[i].width>w || imgList[i].height>h){
		            imgList[i].width = w;
		            imgList[i].heigth = h;
		        }
		    }
		}
		setImg(400,400);
	</script>
	</ul>
  </body>
 </html>

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The effect is as follows:

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