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html:
<img src="__IMG__/male.png" id="imgfpic1" style="height: 100%; width: auto; max-width: 100%;">
<input type="file" id="pic" name="pic" onchange="setpreimg();" style="position:absolute; top: 0px; left: 0px; bottom: 0px; width: 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]);
}
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原文地址:http://www.cnblogs.com/w10234/p/5671997.html