function autotab(thisval,fname,flen){
 
 var fieldname = eval("document.signup." + fname);

 if(thisval != 9 && thisval != 16){

 if(fieldname.value.length + 1 <= flen){
  fieldname.focus();
 }
else
{
 
  for(x=0; x<document.signup.elements.length; x++){
        if(fieldname.name == document.signup.elements[x].name){
                var nextfield = x + 1;
        }
  }

         document.signup.elements[nextfield].focus();

 }
 }
}