input[type = file]选择图片后展示

<input onchange="show(this)" type="file" name="imgs[]" multiple accept="image/gif, image/png, image/jpg, image/jpeg">
<img src="" id="imgs">

        function get_img(f) {
				var rd = new FileReader();//创建文件读取对象
				var files = f.files[0];//获取file组件中的文件
				rd.readAsDataURL(files);文件读取装换为base64类型
				rd.onloadend = function(e) {
                                        //加载完毕之后获取结果赋值给img
					document.getElementById("img").src = this.result;
				}
			}

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