function IsOptChecked(theObj,theObjType,theReturnType){
	var blnChecked=false;
	var isSelect=false;
	var objType=theObjType==null?"":theObjType;
	var checkedValue="";
	if(theObj){
		isSelect=theObjType.toLowerCase()=="select";
		if(theObj.length>1){
			for(var i=0;i<theObj.length;i++){
				blnChecked=isSelect?theObj[i].selected:theObj[i].checked;
				if(blnChecked){
					checkedValue=theObj[i].value;
					break;
				}
			}
		}
		else{
			blnChecked=isSelect?theObj.selected:theObj.checked;
			checkedValue=theObj.value
		}
	}
	return theReturnType=="bool"?blnChecked:checkedValue;
}

function checkVote(theForm){
	var blnansChecked=true;
	var ans=theForm.ans;
	if(ans) blnansChecked=IsOptChecked(ans,"","bool");

	if(blnansChecked){
		return true;
	}else{
		alert('請先選擇您的意見！');
		return false;
	}
}