programming question

Question

1)Code not working

strbldTextboxDiv.append("<input type='text' name='middledigits' maxLength=3 style='width:35px;height:15px'>&nbsp;");

strbldTextboxDiv.append("<input type='text' name='lastdigits' maxLength=4 style='width:45px;height:15px'>&nbsp;");

strbldTextboxDiv.append("<input type='button' src='http://localhost/gadgets/fiosavailability/searchbtn.gif'style='width:50px;height:20px' align='absmiddle' onclick='searchinfo()'>"); //its giving error "Object expected"

secondDIV.appendChild(strbldTextboxDiv);

function searchinfo()

 {

 var sinput=document.getElementsByName("middledigits");

 alert(sin.value);

 }

2) Code not working

addradiobutton("Help");

function addradiobutton(option)

{

var rdoptions=document.createElement("input");

//rdoptions.id="rdo" + option;

rdoptions.type="radio";

rdoptions.value=option;

rdoptions.name="rdooptions";

//rdoptions.title=option;

rdoptions.checked=option;

rdoptions.attachEvent("onclick",testbutton);

secondDiv.appendChild(rdoptions);

//var op1=(option!="Both") ? lbl.innerHTML=option + "&nbsp;&nbsp;<span style='color:red'>or</span>&nbsp;&nbsp;": lbl.innerText=option

} //I am not able to select any of the radio buttons

Appreciate any  help!!

 Thanks