请不要生气,因为我是java脚本的初学者。使用java脚本我想验证单选按钮输入。我编写了一个检查输入字段的脚本,如果它是空的,则会突出显示该字段。我正在使用输入字段的类名(reqd, reqdRight etc.)
。有没有办法通过使用他们的类名验证无线电输入。
脚本是:
window.onload = initForms;
function initForms() {
for (var i = 0; i < document.forms.length; i++) {
document.forms[i].onsubmit = function() { return validForm(); }
}
}
function validForm() {
var allGood = true;
var allTags = document.getElementsByTagName("*");
for (var i = 0; i < allTags.length; i++) {
if (!validTag(allTags[i])) {
allGood = false;
}
}
return allGood;
function validTag(thisTag) {
var outClass = "";
var allClasses = thisTag.className.split(" ");
for (var j = 0; j < allClasses.length; j++) {
outClass += validBasedOnClass(allClasses[j]) + " ";
}
thisTag.className = outClass;
if (outClass.indexOf("invalid") > -1) {
thisTag.focus();
if (thisTag.nodeName == "INPUT") {
thisTag.select();
}
return false;
}
return true;
function validBasedOnClass(thisClass) {
var classBack = "";
switch (thisClass) {
case "":
case "invalid":
break;
case "reqd":
if (allGood && thisTag.value == "") {
classBack = "invalid ";
}
classBack += thisClass;
break;
case "reqdRight":
if (allGood && thisTag.value == "") {
classBack = "invalid ";
}
classBack += thisClass;
break;
case "reqddrpd":
if (allGood && thisTag.value == "") {
classBack = "invalid ";
}
classBack += thisClass;
break;
default:
classBack += thisClass;
}
return classBack;
}
}
}