File API get input value
$(document).on('change','#imageUpload',function(e){
var input = e.target;
var file = input.files[0];
var reader = new FileReader();
var dataURL = reader.readAsDataURL(file);
reader.onload = function(){
var src = reader.result;
$("#uImagePrev").css({"background-image":"url("+src+")"});
}
})