document.form.variable.value

[Stefco]

ciao a tutti..
sto provando a fare questo:

var report
report=document.form.report.value;
var suite
suite=document.form.suite.value;
alert(suite)
window.open('takesess.asp?report='+report+'&suite='+suite);

dove il campo suite è:

  <td colspan="2">
      <div align="left">
	  <input type="checkbox" name="suite" value="Final Cut 1" onClick="ctr(this)"
	  <%if session("suite")="Final Cut 1" then Response.Write("checked")%>>
<span class=h6>Final Cut 1</span> 
        <input type="checkbox" name="suite" value="Smoke 2 " onClick="ctr(this)"
		<%if session("suite")="Smoke 2" then Response.Write("checked")%>>
<span class=h6>Smoke 2</span> 
        <input type="checkbox" name="suite" value="Lustre 1" onClick="ctr(this)"
		<%if session("suite")="Lustre 1" then Response.Write("checked")%>>
<span class=h6>Lustre 1</span>
        <input type="checkbox" name="suite" value="Smoke 1" onClick="ctr(this)"
		<%if session("suite")="Smoke 1" then Response.Write("checked")%>>
<span class=h6>Smoke 1</span>
        <input type="checkbox" name="suite" value="Lustre 2" onClick="ctr(this)"
		<%if session("suite")="Lustre 2" then Response.Write("checked")%>>
<span class=h6>Lustre 2</span> </div>
    </td>

ma ricevo il messaggio "undefined"....
come faccio a fargli leggere il valore della checkbox????

grazie mille...