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我有2个javascript函数。一个在页面上写入两个值,第二个尝试读取这些值。问题是第二个函数不能读取这些值 - 它说“未定义”。在使用Javascript填充它之后无法读取dom元素的值
的功能是:
<html>
<body onload="generate()">
<p>
<a type="number" id="first"></a>
<a>+</a>
<a type="number" id="second"></a>
<a>=</a>
<input type="number" id="result"></input>
<button id="submit" onclick="dosome()">Submit</button>
<p id="super"></p>
<script>
var press_flag ="no";
var press_flag ="no";
function generate()
{
var x = Math.round(Math.random()*100);
var y = Math.round(Math.random()*100);
document.getElementById("first").innerHTML = x;
document.getElementById("second").innerHTML = y;
var result = document.getElementById("result").value;
setTimeout(function() {
alert(press_flag);
if (press_flag == "yes")
{}
else
{
document.getElementById("submit").disabled = true;
var result = x+y;
document.getElementById("super").innerHTML = result;
}
}, 7000);
}
function dosome()
{
press_flag= "yes";
alert(document.getElementById("first").value);
var a = document.getElementById("first").value;
var b = document.getElementById("second").value;
var c = document.getElementById("result").value;
var resultfinal = Number(a) + Number(b);
if (c==resultfinal)
{
document.getElementById("super").innerHTML = "Superb my boy!";
}
}
</script>
</body>
</html>
这些ids'first'&'second'的dom元素是什么?可以请您分享html吗? – brk
您能不能请分享html文件 –
加了完整的代码 – coderatlarge