jsp - How to pass form name to javascript and use it to read form values -


i wanted know how pass form name dynamically , use retrieve form values. used below code.

function validatecbr(form,outagetkt) {      var formname = form.name;     alert(formname);      var cbr1 = formname.cbr11.value;     var cbr2 = formname.cbr22.value;     var cbr3 = formname.cbr33.value;     var cbrnum = cbr1+cbr2+cbr3;     if(cbr1.length !=3){         alert("please enter 10 digit account telephone number");         formname.cbr11.focus();         return false;     }     else if(cbr2.length !=3){         alert("please enter 10 digit account telephone number");         formname.cbr22.focus();         return false;     }     else if(cbr3.length !=4){         alert("please enter 10 digit account telephone number");         formname.cbr33.focus();         return false;     }     else     {         alert("cbrnum "+cbrnum);          formname.method="post";         formname.action="/support/residential/outage/serviceoutage?cbrnum="+cbrnum+"&btn="+btn+"&outagetkt="+outagetkt;         formname.submit();     } }

the below body content

<body>     <%int nc=0; %>          <div id="kmu_alerts">             contact me alternative notification phone number1.             <%nc++; %>                 <form name="kmuform<%=nc%>" id="kmuform<%=nc%>" action="javascript:validatecbr(document.kmuform<%=nc%>,'outage');">                     <input type="text" name="cbr1" id="cbr11"                     onpaste="return false;" style="width: 35px;" maxlength="3"                     size="2" />                      <input type="text" name="cbr2" id="cbr22"                     onpaste="return false;" style="width: 35px;" maxlength="3"                     size="2" />                      <input type="text" name="cbr3" id="cbr33"                     onpaste="return false;" style="width: 35px;" maxlength="4"                     size="2" />                      <input id="clickme" type="button" value="submit" onclick="javascript:validatecbr(document.kmuform<%=nc%>,'outage');"/>                 </form>         </div>          <div id="kmu_alerts">             contact me alternative notification phone number2.             <%nc++; %>             <form name="kmuform<%=nc%>">                 <input type="text" name="cbr1" id="cbr11"                 onpaste="return false;" style="width: 35px;" maxlength="3"                 size="2" />                  <input type="text" name="cbr2" id="cbr22"                 onpaste="return false;" style="width: 35px;" maxlength="3"                 size="2" />                  <input type="text" name="cbr3" id="cbr33"                 onpaste="return false;" style="width: 35px;" maxlength="4"                 size="2" />                  <input id="clickme" type="button" value="submit" onclick="javascript:validatecbr(this.form,'outage');"/>             </form>         </div> </body>

but code showing "'cbr11.value' null or not object" @ "formname.cbr11.value;" line..

can pls tell me how pass form name js function , use read form values.

var formname = form.name;

formname here string , not htmlformelement object

access form field's values using form object

var cbr1 = form.cbr11.value;

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