get post

post :

TagID ="MuNiMan"

var varForm = document.getElementById(FormName);

  var aa=document.FormName.TagID.value;
  document.getElementById("MuNiMan").value=aa;
  varForm.action = "ext.asp";
  varForm.submit();

get : ext.asp?var1=aa&var2=<%=aspsource%>