html:
<img src="__IMG__/male.png" id="imgfpic1" style="height: 100%; auto; max- 100%;">
<input type="file" id="pic" name="pic" onchange="setpreimg();" style="position:absolute; top: 0px; left: 0px; bottom: 0px; 100%; height: 100%; z-index: 999; opacity: 0;"/>
js:
//使用html5的FileReader属性
if(window.FileReader){
var oFReader = new window.FileReader(),
rFilter = /^(?:image/bmp|image/cis-cod|image/gif|image/ief|image/jpeg|image/jpeg|image/jpeg|image/pipeg|image/png|image/svg+xml|image/tiff|image/x-cmu-raster|image/x-cmx|image/x-icon|image/x-portable-anymap|image/x-portable-bitmap|image/x-portable-graymap|image/x-portable-pixmap|image/x-rgb|image/x-xbitmap|image/x-xpixmap|image/x-xwindowdump)$/i;
oFReader.onload = function (e) {
$("#imgfpic1").attr('src', e.target.result);
};
var aFiles = document.getElementById("pic").files;
if (aFiles.length === 0) { return; }
if (!rFilter.test(aFiles[0].type)) { alert("You must select a valid image file!"); return; }
oFReader.readAsDataURL(aFiles[0]);
}