About Writing XML using JavaScript

function WriteFile()
{

var fh = fopen("c:\\MyFile.txt", 3); // Open the file for writing

if(fh!=-1) // If the file has been successfully opened
{
    var str = "Some text goes here...";
    fwrite(fh, str); // Write the string to a file
    fclose(fh); // Close the file
}

}

WriteFile();