<label for="dessert">What is your favourite dessert?*</label>
<input type="text" id="dessert" onchange="checkForm()"><br>
<div id="dessertmsg"> </div>
<input type="submit" value="Submit" id="subbutton" disabled>
我想显示按钮。为了显示该按钮,我希望验证为true:
function checkForm()
{
var dessert = document.getElementById("dessert").value;
if(dessert == "cake"|| dessert == "cookie" || dessert == "icecream"){
当它为true时,我希望启用该按钮。我知道我必须使用禁用的:False,但是我将如何为此编写代码行?
document.getElementById(
残疾人的ID是什么)
? 最佳答案
function checkForm() {
var button = document.getElementById("subbutton");
var dessert = document.getElementById("dessert").value;
if(dessert == "cake"|| dessert == "cookie" || dessert == "icecream") {
button.disabled = undefined;
}
else {
button.disabled = true;
}
}
示例:http://jsfiddle.net/3NudE/(有3个裸体,呜!)
关于javascript - Javascript功能编号,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/10576051/