checkbox排它选择
//checkbox选择第一项则不能选择其它项function checkSymptomPossible(){var symptomPossible=document.getElementsByName("managementSyndromesymptomPossible_chk");if(symptomPossible[0].checked){for(var i=1;i<symptomPossible.length;i++){symptomPossible[i].checked=false;}}}