javascript：如何阻止页面重装？ [英] javascript: how to stop the page from reloading?

问题描述

我刚写了一个小程序，它从用户那里获取输入并显示了阶乘表。以下是代码：

I just wrote a small program which takes the input from user and shows the factorial table. Here is the code:

<h1>Table of factorials</h1>
<h3>Enter the number:<h3>
<form name="form1">
    <input type="text" name="num" onchange="display(parseInt(document.form1.num.value))"/>
    <input type="button" />
</form>
<script>
    function factorial(n){
        if(n<=1) return n;
        else return n*factorial(n-1);
    }
    function display(x){
        document.write("<table>");
        document.write("<tr><th>n</th><th>n!</th></tr>");
        for(var i =1;i<=x;i++){
            document.write("<tr><td>"+i+"</td><td>"+factorial(i)+"</td></tr>");
        }
        document.write("</table>");
        document.write("Generated at"+ new Date());
    }


</script>

但问题是表格显示后表格会立即重新加载。
但是如果我使用按钮来触发函数 onclick =display（parseInt（document.form1.num.value））它就可以了。
如何解决此问题？


编辑：刚刚注意到它在firefox中运行正常。问题在于chrome，opera和safari

But the problem is the form reloads again immediately after showing the table. But if i use the button to trigger the function by onclick="display(parseInt(document.form1.num.value))" it does fine.
How to fix this?

Just noticed that it works fine in firefox too. The problem is with chrome, opera and safari

推荐答案

阻止输入按钮的默认操作。您可以通过JQuery的 preventDefault（）
函数来执行此操作。或者只需< form onsubmit =return false;> ...< / form>

prevent the default action of the input button. You can do this by JQuery's preventDefault() function .Or just <form onsubmit="return false;"> ... </form>

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