//点击选择图片
<input type="file" accept="image/*" capture="camera" name="file_head" id="file_head" onchange="javascript:setImagePreview();" >
//存放图片的额容器
<img id="preview" width="-1" height="-1" style="display: none"/>
// js部分代码
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 = "200px",
preview.style.height = "auto",
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 = "200px",
localImag.style.height = "auto";
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
}
