JS 中如何正确读取 Radio 的值(转)
<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>读取 Radio 的值</title></head><body><div><hr></div><form id="form1" action="" method=""> <div><input type="radio" name="r" id="r1" value="一"><label for="r1">选项一</label></div> <div><input type="radio" name="r" id="r2" value="二"><label for="r2">选项二</label></div> <div><input type="radio" name="r" id="r3" value="三"><label for="r3">选项三</label></div> <div><input type="button" value="检查选择项" ></div></form><script type="text/javascript" language="javascript"><!--function Foo(){ var selectedIndex = -1; var form1 = document.getElementById("form1"); var i = 0; for (i=0; i<form1.r.length; i++) { if (form1.r.checked) { selectedIndex = i; alert("您选择项的 value 是：" + form1.r.value); break; } } if (selectedIndex < 0) { alert("您没有选择任何项"); }}--></script></body></html>
页:
[1]