function sendform(Path){

var rad = document.form1.Angebot;

if ( rad[0].checked == true ) { doRequest(Path + "/abo_form.php?Angebot=1&a=1"); }  
if ( rad[1].checked == true ) { doRequest(Path + "/abo_form.php?Angebot=2&a=1"); } 
if ( rad[2].checked == true ) { doRequest(Path + "/abo_form.php?Angebot=3&a=1"); } 

}