Question

判断单选框是否选中

Answer 1

请问 myform.dw 是什么来的，
<form id="myForm"><input name="danwei" id="d1" type="radio" /><input name="danwei" id="Radio1" type="radio" /><input name="danwei" id="Radio2" type="radio" /><input name="danwei" id="Radio3" type="radio" /><input name="danwei" id="Radio4" type="button" value="验证" onclick="check()" /> </form><script> function check() { var flag = 0; var _radio = document.getElementById("myForm").getElementsByTagName("input");//获取单选框集合 for (var i = 0; i < _radio.length-1; i++) if (_radio[i].checked == true) { flag = 1; break; } if (!flag) { alert("请选择单位!"); return false; } else { alert("已经选择了单位!"); return true; } }</script>