【发布时间】:2013-07-31 14:01:21
【问题描述】:
我创建了两个执行这些任务的函数:
function displayBanner(currentDate) {
/* get the month from current Date */
/* Set the imgsource variable to be the defaultLogo
image */
/* If month is 12, 1, or 2, set variable imgsource to
winterLogo or to the defaultLogo if not one of those
three months */
/* If month is 3, 4, or 5, set imgsource to springLogo
or to the defaultLogo if not one of those three
months */
/* If month is 6, 7, or 8, set imgsource to summerLogo
or to the defaultLogo if not one of those three
months */
/* If month is 10, 11, or 12, set imgsource to fallLogo
or to the defaultLogo if not one of those three
months */
/* Return the imagesource variable to set the myBanner
imgSrc attribute to that image*/
}
function calcDaysToSale(currentDate) {
/* create a Date object for the 15th of the
current month */
/* compute difference in days between currentDate
And the 15th */
/* if the difference is positive return that value
Else return message that the sale is over for this
month */
}
但是!我的意思是创建第三个函数,它可以驻留在索引页的标题中,随后可以执行这些函数,这就是问题所在——我想不通。
我已经使用 'alert();' 检查了我的工作功能,这表明我创建的两个操作是合理的,但我无法确定如何让他们的行为可以这么说。
页面如下所示:
<script type="text/javascript" src="flowers.js"></script>
<script type="text/javascript">
var curdate = new Date()
alert(curdate);
function displayBanner(currenttDate) {
var munf = currenttDate.getMonth();
switch (munf) {
case 9:
case 8:
case 10:
imageSrc = 'fallLogo.gif';
break;
case 11:
case 0:
case 1:
imageSrc = 'winterLogo.gif';
break;
case 2:
case 3:
case 4:
imageSrc = 'springLogo.gif';
break;
case 7:
case 5:
case 6:
imageSrc = 'summerLogo.gif';
break;
default:
imageSrc = 'defaultLogo.gif';
}
return imageSrc;
}
function calcDaysToSale(currentDate) {
var saleMessage;
var mday = currentDate.getDate()
if (currentDate < 15) {
var lef = (15 - currentDate);
//alert("There are " + lef + " days until the Sale.");
saleMessage = lef;
} else if (currentDate == 15) {
//alert("The Sale is today!");
saleMessage = "Zero, it's Today!";
} else {
//alert("The Sale for this month has ended.");
saleMessage = "The Sale for this month has ended.";
}
return saleMessage;
}
alert(calcDaysToSale(curdate));
alert(displayBanner(curdate));
function pageSetup() {
}
</script>
</head>
<body class="oneColLiqCtrHdr">
<div id="container">
<div id="header">
<p><img name="myBanner" id="myBanner" src="" alt="Carol's Flowers" />
<!-- end #header -->
</p>
<div id="links"><a href="#">Home</a> | <a href="#">General Arrangements</a> |
<a href="#">Seasonal Designs</a> | <a href="#">Custom Orders</a> |
<a href="#">Location</a></div>
</div>
<div id="mainContent">
<table id="mainTable">
<tr>
<td width="201"><h1><img src="Flowers.JPG" alt="Random Flowers" width="200" height="255" /></h1></td>
<td width="687">
<p>Here at Carol's Flowers, we believe that there is a perfect floral arrangment for every occasion! Take a look around and see if there is anything you like. If we don't already have it, then we will create it for you!</p></td>
</tr>
</table>
<!-- end #mainContent --></div>
<div id="footer">
<p> <form name="sale" id="sale">
Days Until Mid Month Madness Sale :
<input type="text" name="saleMessage" id="saleMessage" /></form></p>
<!-- end #footer --></div>
<!-- end #container --></div>
</body>
</html>
但正如我所说,我的意思是删除前两个函数,将它们放入单独的“flowers.js”页面并使用 pagesetup() 函数运行所有内容。
这两个函数的目标是一方面为横幅设置图像源,另一方面在底部显示距离“促销”(即 15 日)的剩余天数月,或者如果 15 号已经过去,让用户知道该信息。
【问题讨论】:
-
ECMAScript/Javscript 与 Java 不同。
-
你能用三行解释你想要达到的目标吗?保持简单..如果你这样做我会帮忙
-
如果您确实将这些函数放在另一个 js 文件中,究竟会发生什么?你有错误吗?
-
你的问题有点不明确,但我承认你似乎意识到了这一点;我至少了解该页面似乎没有按照您的希望执行。至少,您知道大多数现代浏览器为您提供的调试工具吗?您仍然需要在较旧的浏览器中进行测试,但是如果您打开 Google Chrome 并按 F12,然后单击“脚本”选项卡,您实际上可以设置断点来为自己提供比仅使用“alert()”更好的信息“在不同的地方。它还有一个控制台,可以报告“未定义”之类的错误。
标签: javascript forms function calendar