function UnCheckAllRadio(obj,divID)
{    
    var dlDiv = document.getElementById(divID);
    var allChk = dlDiv.getElementsByTagName("input");
    for(var i = 0 ; i < allChk.length ; i++)
    {
        if(allChk[i].type == "radio")
        {
           if (obj != allChk[i])
           {
            allChk[i].checked = false; 
           }
        }
    }
}

function IsARadioChecked(divID)
{    
    var count=0;
    var dlDiv = document.getElementById(divID);    
    var allChk = dlDiv.getElementsByTagName("input");
    for(var i = 0 ; i < allChk.length ; i++)
    {
        if(allChk[i].type == "radio")
        {
            count++;
           if (allChk[i].checked == true)
           {
                return true;
           }
        }
    }
    return count== 0 ? true: false;
}