js实现图片上传预览
<!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 #000; } </style> </head> <body> <div id="preview"></div> <input type="file" onchange="preview(this)" /> <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' +' style='+'"width: 100px;height: 100px"'+' 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>