Code like this:

$(document).ready(function(){

document.ondragover=function(e){

e.preventDefault();

};

document.ondrop=function(ev){

var reader = new FileReader;

reader.onload=function(){

var result = reader.result;

$("#textarea1").attr('value',result);

};

reader.readAsTxt(ev.dataTransfer.files[0],"utf-8");

ev.preventDefault();

};

});

</script>

the function onload of FileReader is invalid!