JavaScript判断Form中的Radio是否有未选中的

function getCheckedValue(radioObj) …{
if(!radioObj)
return “”;
var radioLength = radioObj.length;
if(radioLength == undefined)
if(radioObj.checked)
return radioObj.value;
else
return “”;
for(var i = 0; i < radioLength; i++) …{
if(radioObj[i].checked) …{
return radioObj[i].value;
}
}
return “”;
}
function check()
…{

for(i = 0; i < document.submitform.all.length; i++)…{
if(document.submitform.all(i).tagName == “INPUT”)…{
var oitem = document.submitform.all.item(i);
var sname = oitem.name;
if(oitem.type.toLowerCase()==”radio”)…{
if(getCheckedValue(document.getElementsByName(oitem.name)) == “”)…{
oitem.focus();
window.scrollBy(0, -30);
alert(“请认真填写所有题目。”);
return (false);
}
}
}
}

document.submitform.submit();

}