htmlWrite

doc = htmlRead("http://www.scilab.org");
htmlWrite(doc, TMPDIR+"/scilab.html", %f);

// Now we open the previous file, modify it and save it
doc1 = htmlRead(TMPDIR+"/scilab.html");
xp = xmlXPath(doc1, "//title");
e = xp(1);
e.content = "Hello Scilab World";
htmlWrite(doc1);

// Now we check that the modification has been done
doc2 = htmlRead(TMPDIR+"/scilab.html");
xp = xmlXPath(doc2, "//title");
xp(1).content

xmlDelete("all");