Java script validations for Radio button list (atleast one must be selectable)


var RBPurpose = document.getElementById("<%=rtbPurposes.ClientID%>");
var radio1 = RBPurpose.getElementsByTagName("input");
    
for (var i = 0; i < radio1.length; i++) {
                if (radio1[i].checked) {
                    break;
                }
                else {
                    ErrorMsg = "Fields marked with (*) cannot be left blank";
                }
            }

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