Javascript save textarea to local text file

// save text to file

// Works in Chrome



function download(){

    var text = document.getElementById("ipbox").value;

    text = text.replace(/\n/g, "\r\n"); // To retain the Line breaks.

    var blob = new Blob([text], { type: "text/plain"});

    var anchor = document.createElement("a");

    anchor.download = getFileName();		// 

    anchor.href = window.URL.createObjectURL(blob);

    anchor.target ="_blank";

    anchor.style.display = "none"; // just to be safe!

    document.body.appendChild(anchor);

    anchor.click();

    document.body.removeChild(anchor);

 }