在javascript中将3个函数合二为一答案

【问题标题】：Combine 3 functions into one in javascript在javascript中将3个函数合二为一
【发布时间】：2015-06-26 00:55:55
【问题描述】：

我尝试将这三个功能合二为一，但我做了之后就不行了。你能帮我把这些结合起来吗？

function showForm(id, name) {
    document.getElementById('submitForm').style.display = "block";
    if (id == 0) {
        document.getElementById('submitForm').style.display = "none";
    } else {
        document.getElementById(i).style.display = 'block';
    }
}

function TestForm(id, name) {
    document.getElementById('TestFormSubmit').style.display = "block";
    if (id == 0) {
        document.getElementById('TestFormSubmit').style.display = "none";
    } else {
        document.getElementById(i).style.display = 'block';
    }
}

function FormOne(id, name) {
    document.getElementById('FormOneSubmit').style.display = "block";
    if (id == 0) {
        document.getElementById('FormOneSubmit').style.display = "none";
    } else {
        document.getElementById(i).style.display = 'block';
    }
}

如果需要，这个是HTML，我用JSFiddle，运行后选择右边的表格，然后会显示“下载表格”，但我不知道怎么做。

<form name="forms" class="form1" id="first">
    <br />
    <p style="text-align: left;" class="form1">Choosing to Make A Difference</p>
    <select id="dropdownMenu" name="budget" onchange="javascript: showForm(document.getElementById('dropdownMenu').value);">
        <option value="0"></option>
        <option value="#">Change Form</option>
        <option value="#">Scholarships and Grants</option>
    </select>
    <br />
    <br />
    <div id="submitForm" style="display: none; position:absolute; margin-top:-20px;">
        <input type="button" id="submit" value="Download Form" onclick="window.open(forms.budget.value,'newtab'+forms.budget.value)" />
    </div>
    <br />
</form>
<form name="forms" class="form1" id="second">
    <br />
    <p style="text-align: left;" class="form1">Choosing to Make A Difference</p>
    <select id="TestFormDropdown" name="budget" onchange="javascript: TestForm(document.getElementById('TestFormDropdown').value);">
        <option value="0"></option>
        <option value="#">Change Form</option>
        <option value="#">Scholarships and Grants</option>
    </select>
    <br />
    <br />
    <div id="TestFormSubmit" style="display: none; position:absolute; margin-top:-20px;">
        <input type="button" id="submit" value="Download Form" onclick="window.open(forms.budget.value,'newtab'+forms.budget.value)" />
    </div>
    <br />
</form>

<form name="forms" class="form1" id="second">
    <br />
    <p style="text-align: left;" class="form1">Choosing to Make A Difference</p>
    <select id="FormOneDropdown" name="budget" onchange="javascript: FormOne(document.getElementById('FormOneDropdown').value);">
        <option value="0"></option>
        <option value="#">Change Form</option>
        <option value="#">Scholarships and Grants</option>
    </select>
    <br />
    <br />
    <div id="FormOneSubmit" style="display: none; position:absolute; margin-top:-20px;">
        <input type="button" id="submit" value="Download Form" onclick="window.open(forms.budget.value,'newtab'+forms.budget.value)" />
    </div>
    <br />
</form>

【问题讨论】：

什么是i？它来自哪里？
请检查 HTML
还是同一个问题。
@PM 77-1 我想我需要添加一个 var 语句对吗？我的意思是声明变量 i
它的值从何而来？

标签： javascript html function

【解决方案1】：

试试这个：

function showForm (id, name)  { 
    document.getElementById('submitForm').style.display = "block";
    if (id == 0) 
        document.getElementById('submitForm').style.display = "none";
     else 
        document.getElementById(i).style.display = 'block';
    }

JavaScript 语句可以在大括号 {...} 内的代码块中组合在一起。

【讨论】：

插入HTML后，第二个表单和第三个表单不会给我“下载表单”文本......

【解决方案2】：

你能试试这个吗？

var functionCollections = {
showForm : function(id, name) {
    document.getElementById('submitForm').style.display = "block";
    if (id == 0) {
        document.getElementById('submitForm').style.display = "none";
    } else {
        document.getElementById(i).style.display = 'block';
    }
},
TestForm : function(id, name) {
document.getElementById('TestFormSubmit').style.display = "block";
    if (id == 0) {
        document.getElementById('TestFormSubmit').style.display = "none";
    } else {
        document.getElementById(i).style.display = 'block';
    }
},
FormOne : function(id, name) {
    document.getElementById('FormOneSubmit').style.display = "block";
    if (id == 0) {
        document.getElementById('FormOneSubmit').style.display = "none";
    } else {
        document.getElementById(i).style.display = 'block';
    }
}

};

在 html 上使用 showForm(id, name); 使用 functionCollections.showForm(id, name);

【讨论】：