从函数参数寻址数组？ [英] Addressing an Array from Function Arguments?
问题描述
我急需一些我认为是小问题的帮助
，我无法解决。
我正在写一个页面，鼠标悬停在一个链接上，一个图像需要显示
，一些文本在数组中定义，应该
出现在表格单元格内（其id为tdDesc）。
这基本上就是HTML文件中的内容：
< body onload =" resetDesc（''WS_Standard''，''3''）;">
< a href = "＃" onmouseover =" showDesc（''WS_Standard''，''1''）;"
onmouseover =" showDesc（''WS_Standard''，''1''）;" >
链接号码1< / a>
这里是'js-file中的'。
01函数showDesc（typeDesc，noDesc ）{
02 var imgDesc =（''img''+ typeDesc +''_''+ noDesc）;
03 document.getElementById（''tdDesc''' ）.innerHTML =
WS_Standard [noDesc];
04 document.getElementById（imgDesc）.style.display ="" ;;
05}
06函数hideDesc（typeDesc，noDesc）{
07 var imgDesc =（''img''+ typeDesc +''_''+ noDesc）;
08 document.getElementById（''tdDesc''）。innerHTML = WS_Standard [0];
09 document.getElementById（imgDesc）.style.display =" none" ;
10}
11 function resetDesc（typeDesc，totalDesc）{
12 for（var i = 1; i< = totalDesc; i ++）{
13 var imgDesc =（''img''+ typeDesc +''_''+ i）;
14 document.getElementById（img Desc）.style.display =" none";
15}
16 document.getElementById（''tdDesc''）。innerHTML = WS_Standard [0]; < br $>
17}
var WS_Standard = new Array（）;
19 WS_Standard [0] ="没有鼠标悬停时的标准文本" ;;
20 WS_Standard [1] =" Sample Text 1";
21 WS_Standard [2] =" Sample Text 2";
22 WS_Standard [3] ="示例文本3";
我的问题出现在解决
数组中的文本，行03,08,16。我想使用我的typeDesc - 参数
地址阵列，但无论我尝试什么，它都是错误或我得到了
string" WS_Standard"或WS_Standard [1]或或类似的东西，但从不在数组WS_Standard [1]中的
文本。
我做错了什么？
我们非常感谢任何帮助！
Martin
Martin Altschwager< co ** *@altschwager.de>在消息中写道
news：bb ************************** @ posting.google.c om ...
onmouseover =" showDesc（''WS_Standard''，''1''）;"
01函数showDesc（typeDesc，noDesc）
{
03 document.getElementById（''tdDesc''）。innerHTML = WS_Standard [noDesc];
你要用字符串下标数组：''1';
-
SC
在文章< 42 ********** @ mk-nntp-2.news.uk.tiscali.com>中，
" Stephen Chalmers" < IG ****** @ lycos.co.uk>写道：
Martin Altschwager< co *** @ altschwager.de>在消息中写道
新闻：bb ************************** @ posting.google.c om ...
onmouseover =" showDesc（''WS_Standard''，''1''）;"
01 function showDesc（typeDesc ，noDesc）
{blockquote class =post_quotes> 03 document.getElementById（''tdDesc''）。innerHTML = WS_Standard [noDesc];
你正在使用字符串订阅数组：''1';
虽然它不标准，但仍应有效因为数字索引
在实际查找之前被转换为字符串值。
Robert
In文章< bb ************************** @ posting.google.com>，
co *** @ altschwager.de （Martin Altschwager）写道：
任何帮助都非常感谢！<无线电通信/>
我不相信我发现你的javascript函数
有任何问题。我填写了缺少的html并更改了一个事件处理程序。
这是我修改过的文件版本。
Robert
<！DOCTYPE HTML PUBLIC" - // W3C // DTD HTML 4.01 Transitional // EN"
" http：//www.w3.org/ TR / html4 / loose.dtd">
< html>
< head>
< title>保存统计数据< / title>
< base href =" http：//spaceplace.jpl.nasa.gov/en/_images/">
< script type = " text / javascript">
/ *
在解决
数组中的文字时出现问题，第03,08,16行。我想使用我的typeDesc - 参数
地址阵列，但无论我尝试什么，它都是一个错误，或者我得到一个
string" WS_Standard"或WS_Standard [1]或或类似的东西，但从来没有数组WS_Standard [1]中的
文本。
更改
调用onmouseout
调用hideDesc
您不显示要更改的文本也不显示图像。可以在id属性中使用
错误的值
这是一个糟糕的变量名称tdDesc''因为它很难辨认
d来自D.
* /
var WS_Standard = new Array（）;
WS_Standard [0] =" Standard没有鼠标悬停时的文字;
WS_Standard [1] =" Sample Text 1";
WS_Standard [2] =" Sample Text 2"
WS_Standard [3] ="示例文本3"
函数showDesc（typeDesc，noDesc）{
var imgDesc =（''img'' + typeDesc +''_''+ noDesc）;
document.getElementById（''tableDescription''）。innerH TML =
WS_Standard [noDesc];
document.getElementById（imgDesc）.style.display ="" ;;
}
function hideDesc（typeDesc，noDesc）{
var imgDesc =（''img''+ typeDesc +''_''+ noDesc）;
document.getElementById（''tableDescription''）。innerH TML =
WS_Standard [0];
document.getElementById（imgDesc）.style.display =" none" ;;
}
函数resetDesc（typeDesc，totalDesc）{
for（var i = 1;我< totalDesc; i ++）{
var imgDesc =（''img''+ typeDesc +''_''+ i）;
document.getElementById（imgDesc）.style.display =" none";
}
document.getElementById（''tableDescription''）。innerH TML =
WS_Standard [0];
}
< / script>
< / head>
< body onload =" resetDesc（''WS_Standard''，WS_Standard.length）;">
< a href ="＃" onmouseover =" showDesc（''WS_Standard''，1）;"
onmouseout =" hideDesc（''WS_Standard''，1）;">
链接号码1< / a>
< p>
< img
id =" imgWS_Standard_1"
src =" common / nasa_header / logo_nasa.gif">
< br>
< img
id =" imgWS_Standard_2"
src =" common / nasa_header / logo_nasa.gif">
< br>
< img
id =" imgWS_Standard_3"
src =" common / nasa_header / logo_nasa.gif">
< / p>
< p>
< span id =" tableDescription" class =" hidden">要显示的消息< / span>
< / p>
< / body>
< ; / html>
Hi,
I desperately need some help with what I assume to be a minor problem
that I just can''t solve.
I''m writing a page where on mouseover a link, an image needs to be
displayed and some text, which is defined inside an array, sould
appear inside a table cell (whose id is "tdDesc").
That''s basically what''s in the HTML-file:
<body onload="resetDesc(''WS_Standard'',''3'');">
<a href="#" onmouseover="showDesc(''WS_Standard'',''1'');"
onmouseover="showDesc(''WS_Standard'',''1'');">
Link no. 1</a>
Here''s what''s in the js-File.
01 function showDesc(typeDesc,noDesc) {
02 var imgDesc = (''img'' + typeDesc + ''_'' + noDesc);
03 document.getElementById(''tdDesc'').innerHTML =
WS_Standard[noDesc];
04 document.getElementById(imgDesc).style.display = "";
05 }
06 function hideDesc(typeDesc,noDesc) {
07 var imgDesc = (''img'' + typeDesc + ''_'' + noDesc);
08 document.getElementById(''tdDesc'').innerHTML = WS_Standard[0];
09 document.getElementById(imgDesc).style.display = "none";
10 }
11 function resetDesc(typeDesc,totalDesc) {
12 for (var i = 1; i <= totalDesc; i++) {
13 var imgDesc = (''img'' + typeDesc + ''_'' + i);
14 document.getElementById(imgDesc).style.display = "none";
15 }
16 document.getElementById(''tdDesc'').innerHTML = WS_Standard[0];
17 }
18 var WS_Standard = new Array();
19 WS_Standard[0] = "Standard text when no mouse over";
20 WS_Standard[1] = "Sample Text 1";
21 WS_Standard[2] = "Sample Text 2";
22 WS_Standard[3] = "Sample Text 3";
My problem appears when it comes to adressing the text that is in the
array, lines 03, 08, 16. I want to use my "typeDesc"-argument to
adress the array, but whatever I try, it''s either an error or I get a
string "WS_Standard" or "WS_Standard[1]" or something, but never the
text in the array WS_Standard[1].
What am I doing wrong?
Any help is highly appreciated!
Martin
Martin Altschwager <co***@altschwager.de> wrote in message
news:bb**************************@posting.google.c om...
onmouseover="showDesc(''WS_Standard'',''1'');" 01 function showDesc(typeDesc,noDesc) {
03 document.getElementById(''tdDesc'').innerHTML = WS_Standard[noDesc];
You''re subscripting the array with the string: ''1'';
--
S.C.
In article <42**********@mk-nntp-2.news.uk.tiscali.com>,
"Stephen Chalmers" <ig******@lycos.co.uk> wrote:
Martin Altschwager <co***@altschwager.de> wrote in message
news:bb**************************@posting.google.c om...onmouseover="showDesc(''WS_Standard'',''1'');"
01 function showDesc(typeDesc,noDesc)
{03 document.getElementById(''tdDesc'').innerHTML = WS_Standard[noDesc];
You''re subscripting the array with the string: ''1'';
While it isn''t standard, that should still work since numeric indexes
are converted a string value before the actual lookup.
Robert
In article <bb**************************@posting.google.com >,
co***@altschwager.de (Martin Altschwager) wrote:
Any help is highly appreciated!
I do not believe that I found any problems with the javascript functions
you showed. I filled in the missing html and changed one event handler.
Here is my revised version of the file.
Robert
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Saving stats</title>
<base href="http://spaceplace.jpl.nasa.gov/en/_images/">
<script type="text/javascript">
/*
My problem appears when it comes to adressing the text that is in the
array, lines 03, 08, 16. I want to use my "typeDesc"-argument to
adress the array, but whatever I try, it''s either an error or I get a
string "WS_Standard" or "WS_Standard[1]" or something, but never the
text in the array WS_Standard[1].
changes
call onmouseout
call hideDesc
you do not show the text to change nor the images. Could have the
wrong values in the id attributes
this is a bad variable name tdDesc ''cause it is hard to distingish
the d from the D.
*/
var WS_Standard = new Array();
WS_Standard[0] = "Standard text when no mouse over";
WS_Standard[1] = "Sample Text 1";
WS_Standard[2] = "Sample Text 2";
WS_Standard[3] = "Sample Text 3";
function showDesc(typeDesc,noDesc) {
var imgDesc = (''img'' + typeDesc + ''_'' + noDesc);
document.getElementById(''tableDescription'').innerH TML =
WS_Standard[noDesc];
document.getElementById(imgDesc).style.display = "";
}
function hideDesc(typeDesc,noDesc) {
var imgDesc = (''img'' + typeDesc + ''_'' + noDesc);
document.getElementById(''tableDescription'').innerH TML =
WS_Standard[0];
document.getElementById(imgDesc).style.display = "none";
}
function resetDesc(typeDesc,totalDesc) {
for (var i = 1; i < totalDesc; i++) {
var imgDesc = (''img'' + typeDesc + ''_'' + i);
document.getElementById(imgDesc).style.display = "none";
}
document.getElementById(''tableDescription'').innerH TML =
WS_Standard[0];
}
</script>
</head>
<body onload="resetDesc(''WS_Standard'',WS_Standard.length );">
<a href="#" onmouseover="showDesc(''WS_Standard'',1);"
onmouseout="hideDesc(''WS_Standard'',1);">
Link no. 1</a>
<p>
<img
id="imgWS_Standard_1"
src="common/nasa_header/logo_nasa.gif">
<br>
<img
id="imgWS_Standard_2"
src="common/nasa_header/logo_nasa.gif">
<br>
<img
id="imgWS_Standard_3"
src="common/nasa_header/logo_nasa.gif">
</p>
<p>
<span id="tableDescription" class="hidden">Message to display</span>
</p>
</body>
</html>
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