有没有老哥能帮我看一下为什么else内的东西不生效呀？

function abc(){
var number1,number2,sum,sum1,sum2,label2,label1,tc;
label1 = document.getElementById("label1").textContent;
label2 = document.getElementById("label2").textContent;
number1 = document.getElementById("textbox1").value;
number2 = document.getElementById("textbox2").value;
number1 = Number(number1);
number2 = Number(number2);
sum1 = number1 * label1;
sum2 = number2 * label2;
sum = Number(sum1) + Number(sum2);
sum = Number(sum);
if (number1>100|| number<0 || number2>100 || number<0) {
alert(sum);
} else {
alert("888");
}

    }function abc(){
        var number1,number2,sum,sum1,sum2,label2,label1,tc;
        label1 = document.getElementById("label1").textContent;
        label2 = document.getElementById("label2").textContent;
        number1 = document.getElementById("textbox1").value;
        number2 = document.getElementById("textbox2").value; 
        number1 = Number(number1);
        number2 = Number(number2);
        sum1 = number1 * label1;
        sum2 = number2 * label2;
        sum = Number(sum1) + Number(sum2);
        sum = Number(sum);
        if (number1>100|| number<0 || number2>100 || number<0) {
        alert(sum);
        } else {
        alert("888");
        } 
        
        
    }

你只定义了| number1 number2
没有定义 number

if (number1 > 100 || number < 0 || number2 > 100 || number < 0) {

应该改成

 if (number1 > 100 || number1 < 0 || number2 > 100 || number2 < 0) {