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``` <!DOCTYPE HTML> <html> <head> <title>上传图片</title> <meta charset="utf-8"> </head> <body> <iframe name="uploadfrm" id="uploadfrm" style="display: none;"></iframe> <form name="formHead" method="post" action="" id="formHead" enctype="multipart/form-data" target="uploadfrm"> <div> <div> <input type="file" name="file_head" id="file_head" onchange="javascript:setImagePreview();" /> </div> <div> <div id="DivUp" style="display: none"> <input type="submit" data-inline="true" id="BtnUp" value="确认上传" data-mini="true" /> </div> </div> </div> </form> <div data-role="fieldcontain"> <div id="localImag"> <img id="preview" width="-1" height="-1" style="display: none" /> </div> </div> <script type="text/javascript"> function setImagePreview() { var preview, img_txt, localImag, file_head = document.getElementById("file_head"), picture = file_head.value; if (!picture.match(/.jpg|.gif|.png|.bmp/i)) return alert("您上传的图片格式不正确,请重新选择!"), !1; if (preview = document.getElementById("preview"), file_head.files && file_head.files[0]) preview.style.display = "block", preview.style.width = "63px", preview.style.height = "63px", preview.src = window.navigator.userAgent.indexOf("Chrome") >= 1 || window.navigator.userAgent.indexOf("Safari") >= 1 ? window.webkitURL.createObjectURL(file_head.files[0]) : window.URL.createObjectURL(file_head.files[0]); else { file_head.select(), file_head.blur(), img_txt = document.selection.createRange().text, localImag = document.getElementById("localImag"), localImag.style.width = "63px", localImag.style.height = "63px"; try { localImag.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)", localImag.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = img_txt } catch(f) { return alert("您上传的图片格式不正确,请重新选择!"), !1 } preview.style.display = "none", document.selection.empty() } return document.getElementById("DivUp").style.display = "block", !0 } </script> </body> </html> ```