上传图片预览

Posted 2020-07-01 北执

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<!DOCTYPE html>  
 <html>  
<head>  
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />  
<style type="text/css">  
 #preview, .img, img  
 {  
 width:200px;  
 height:200px;  
 }  
 #preview  
 {   
 border:1px solid #dedede;
} 
/*a  upload */
.a-upload {
	width:200px;
	height: 200px;
	text-align:center;
	text-decoration: none;
    line-height: 20px;
    position: relative;
	bottom:202px;
	opacity:0;
    cursor: pointer;
    color: #888;
    background: #fafafa;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
    display: inline-block;
    *display: inline;
    *zoom: 1
}

.a-upload  input {
    position: absolute;
    font-size: 16px;
    right: 0;
    top: 0;
    opacity: 0;
    filter: alpha(opacity=0);
    cursor: pointer
	text-decoration:none;
	width:200px;
	height: 200px;
}

.a-upload:hover {
} 
 </style>  
 </head>  
<body>  
	<div id="preview"></div> 
	<a href="javascript:;" class="a-upload"> 
		<input type="file" onchange="preview(this)" />
	</a>
 <script type="text/javascript">    
 function preview(file)  
 {  
 var prevDiv = document.getElementById(‘preview‘);  
 if (file.files && file.files[0])  
 {  
 var reader = new FileReader();  
 reader.onload = function(evt){  
 prevDiv.innerHTML = ‘<img src="‘ + evt.target.result + ‘" />‘;  
}    
 reader.readAsDataURL(file.files[0]);  
}  
 else    
 {  
 prevDiv.innerHTML = ‘<div class="img" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src=\‘‘ + file.value + ‘\‘"></div>‘;  
 }  
 }  
 </script>  
 </body>  
 </html>

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