上传预览图片

//上传预览
function showFile(data){
    var thisfile = $(data).children('input')[0];
    contentLoaded(thisfile)
}
function ProcessFile(items) {
    var file = $(items).prop ('files')[0];
    var img = $(items).parent().parent().prev()[0];
    if ( file) {
        var reader = new FileReader();
        reader.onload = function ( event ) {
            var txt = event.target.result;

            img.src = txt;
        };
    }
    reader.readAsDataURL( file );
}
function contentLoaded(_this) {
    _this.addEventListener( 'change' ,
        function(){
            ProcessFile(_this);
        }, false );
}