<input type="hidden" name="n1" value="5" />
<input type="hidden" name="n1" value="3" />
var elem = document.getElementById("mytext");
elem.value = "My default value";
document.getElementById("mytext").value = "My default value";
window.onload = function () {
var m = document.getElementsByClassName("t");
for(var i = 0; i < m.length; i++) m[i].value = 1;
};
window.onload = function () {
document.getElementsByClassName("t").value = 1;
};