上传图片并预览

<div class="mms_uploadIconBox" >
<input class="mms_add_imgBox" style="opacity: 0;" type="file" id="file1" name="file" accept="image/*"/>
<div class="mms_uploadIcon"><img id="picture1" src="images/add.png"></div>
</div>

function getPhoto(node){

var file = node.files[0],

reader = new FileReader();

reader.readAsDataURL(file);

var file_size = file.size/1024;

console.log(file_size);

if(file.file_size>3000){
layer.msg('文件过大，请重新上传');
return false
}
reader.onload = function(e){
// for(var i=0;i<e.target.result.length;i++){
// imgdata+=e.target.result.charCodeAt(i).toString(16);
// }
$("#picture1").attr("src",e.target.result);
console.log(e.target.result);
};
}