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();
}
getCheckedValue 获取单选框的值,
// return the value of the radio button that is checked
// return an empty string if none are checked, or
// there are no radio buttons
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 "";
}
// set the radio button with the given value as being checked
// do nothing if there are no radio buttons
// if the given value does not exist, all the radio buttons
// are reset to unchecked
function setCheckedValue(radioObj, newValue) {
if(!radioObj)
return;
var radioLength = radioObj.length;
if(radioLength == undefined) {
radioObj.checked = (radioObj.value == newValue.toString());
return;
}
for(var i = 0; i < radioLength; i++) {
radioObj[i].checked = false;
if(radioObj[i].value == newValue.toString()) {
radioObj[i].checked = true;
}
}
}
check函数,判断所有单选框是否有未选择的,如果有显示提示.