​x
 
<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript addEventListener()</h1>
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<p>此例演示如何在使用 addEventListener() 方法时传递参数值。</p>
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<p>单击按钮以执行计算。</p>
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<button id="myBtn">试一试</button>
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<p id="demo"></p>
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<script>
var p1 = 5;
var p2 = 7;
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document.getElementById("myBtn").addEventListener("click", function() {
  myFunction(p1, p2);
});
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function myFunction(a, b) {
  var result = a * b;
  document.getElementById("demo").innerHTML = result;
}
</script>
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</body>
</html>
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