Question

JS问题求助!!!!如下:这个哪里出了问题呢?

<script language="javascript">
var num1,num2;
function input(num1,num2){
num1=prompt("Please Enter The First Number !","")
num2=prompt("Please Enter The Second Number !","")
}
function asd(x,y){
if((x==null)||(y==null))alert("I Never Think So !");
else{
answer=Number(x)+Number(y);
alert(answer)
}
}
</script>
<form>
<input type="button" value="Plus" onclick="input(),asd(num1,num2)" />
</form>

Answer 1

你的num1 num2的值并没有传给x,y，所以x,y的值为空，提示的是”I Never Think So !”一般用按钮来触发,最好就是用一个函数来解决问题，代码如下:
<script language="javascript">
var num1,num2;
function input(num1,num2){
num1=prompt("Please Enter The First Number !","")
num2=prompt("Please Enter The Second Number !","")

var x=num1;
var y=num2;
//此处去掉你的asd(num1,num2)函数，直接将值传递给x,y
if((x==null)||(y==null))
{
alert("I Never Think So !");
}
else
{
answer=Number(x)+Number(y);
alert(answer);
}
}
</script>
<form>
<input type="button" value="Plus" onclick="input();" /> //此处你在input()后面忘了加”;”
</form>

Answer 2

onclick="input(),asd(num1,num2)"

num1,num2 这两个参数你没有传值

js里的num1和num2跟这个一点联系没有