如何获取变量值而不是变量名称。 [英] How to get Variable value not Variable name.
问题描述
我目前正在开发一个ASP页面，在那里我创建了很多
不同的复选框。我有一些复选框是Windows
平台，有些是solaris平台。我想在Windows上打开一个控件
复选框将它们全部打开或全部关闭，并且
与solaris相同。
其中一个控件复选框如下所示：
< input type =" checkbox" name =" objRS（" ProductId"）& _solaris
value ="" 0"" onClick ="" checkAll（this.form，name）;"">
这给了我一个名字如下的复选框：
194_solaris
194是我公司产品的产品ID，而solaris只是
来判断它的窗户是不是Solaris操作系统。现在我知道这是
的名字，这个复选框不是我的问题。
现在当我通过onClick ="" checkAll（这个.form，name）我去的部分：
< SCRIPT LANGUAGE =" JavaScript">
function checkAll（form，CheckBoxName）
var myVar = CheckBoxName
if（form.CheckBoxName.checked == true）{< --------问题行
for（i = 0; i< form.elements.length; i ++）
{
if（form.elements [i] .id == myVar）
form.elements [i] .checked = true;
}
} else {
for（i = 0; i< form.elements.length; i ++）
{
if（form.elements [i] .id == myVar）
表格.elements [i] .checked = false;
}
< / script>
现在当我打电话给我时得到一个错误，好像说：
CheckBoxName.checked为null或未声明
我知道很好，CheckBoxName.checked一世未声明，但
CheckBoxName的VALUE是有效名称。我希望名为CheckBoxName的
变量的内容不是名称。我怎么能这样做？
I am currently working on an ASP page where I create a lot of
different check boxes. I have some checkboxes that are Windows
platforms and some that are solaris platforms. I want a control
checkbox over the Windows ones to turn them all on or all off, and the
same with the solaris.
One of the control check boxes looks something like this:
<input type="checkbox" name="objRS("ProductId") & "_solaris"
value=""0"" onClick=""checkAll(this.form,name);"">
This gives me a check box with a name that looks like:
194_solaris
194 is the productID for a product at my company, and solaris is just
to tell if its windows or solaris. Now I know this is the name of
that checkbox this is NOT my problem.
Now when I pass the onClick=""checkAll(this.form,name) part I go to:
<SCRIPT LANGUAGE="JavaScript">
function checkAll(form, CheckBoxName)
var myVar = CheckBoxName
if (form.CheckBoxName.checked == true){ <-------- Problem Line
for (i=0; i<form.elements.length; i++)
{
if (form.elements[i].id == myVar)
form.elements[i].checked = true;
}
}else {
for (i=0; i<form.elements.length; i++)
{
if (form.elements[i].id == myVar)
form.elements[i].checked = false;
}
</script>
Now when I call this I get an error thats says:
"CheckBoxName.checked is null or not declared"
Well I know good and well CheckBoxName.checked is not declared, but
the VALUE of CheckBoxName is a valid name. I want the content of the
variable named CheckBoxName not the name. How can I do this?
推荐答案
在文章< 18 ****************** ********@posting.google.com>，
la * **********@students.uwlax.edu 说...
In article <18**************************@posting.google.com >,
la***********@students.uwlax.edu says...
我目前正在开发一个ASP页面，在那里我创建了很多
不同的复选框。我有一些复选框是Windows
平台，有些是solaris平台。我希望Windows上的控件复选框可以全部打开或全部关闭，而且与solaris相同。
其中一个控件复选框看起来像这个：
< input type ="复选框" name =" objRS（" ProductId"）& _solaris
value ="" 0"" onClick ="" checkAll（this.form，name）;"">
这给了我一个名称如下的复选框：
194_solaris
194是我公司产品的产品ID，solaris只是告诉它是windows还是solaris。现在我知道这是
的名称，这个复选框不是我的问题。
现在，当我通过onClick ="" checkAll（this.form，name）部分时我会去to：
< SCRIPT LANGUAGE =" JavaScript">
函数checkAll（form，CheckBoxName）
var myVar = CheckBoxName
if（form.CheckBoxName。 checked == true）{< --------问题行
for（i = 0; i< form.elements.length; i ++）
{
< snippage />
" CheckBoxName.checked为null或未声明"
我知道很好并且没有声明CheckBoxName.checked，但
CheckBoxName的值是一个有效名称。我希望名为CheckBoxName的变量的内容不是名称。我怎么能这样做？
I am currently working on an ASP page where I create a lot of
different check boxes. I have some checkboxes that are Windows
platforms and some that are solaris platforms. I want a control
checkbox over the Windows ones to turn them all on or all off, and the
same with the solaris.
One of the control check boxes looks something like this:
<input type="checkbox" name="objRS("ProductId") & "_solaris"
value=""0"" onClick=""checkAll(this.form,name);"">
This gives me a check box with a name that looks like:
194_solaris
194 is the productID for a product at my company, and solaris is just
to tell if its windows or solaris. Now I know this is the name of
that checkbox this is NOT my problem.
Now when I pass the onClick=""checkAll(this.form,name) part I go to:
<SCRIPT LANGUAGE="JavaScript">
function checkAll(form, CheckBoxName)
var myVar = CheckBoxName
if (form.CheckBoxName.checked == true){ <-------- Problem Line
for (i=0; i<form.elements.length; i++)
{ <snippage />
"CheckBoxName.checked is null or not declared"
Well I know good and well CheckBoxName.checked is not declared, but
the VALUE of CheckBoxName is a valid name. I want the content of the
variable named CheckBoxName not the name. How can I do this?
a。我会尽量不使用形式这个词。作为变量名称。很容易
与对象类型混淆。但是，如果它工作 - 很好。
if（form [CheckBoxName] .checked == true）{
那应该是您。确保表单
对象和第一个方括号之间有空格。
-
从电子邮件中删除NOT地址回复。反垃圾邮件在行动。
a. I would try not to use the word "form" as a variable name. Too easy
to get mixed up with the object type. But, if it works - fine.
if (form [CheckBoxName].checked == true) {
That should do it for you. Make sure there is a space between the form
object and the first square bracket.
--
Remove NOT from email address to reply. AntiSpam in action.
Pete Mahoney写道：
Pete Mahoney wrote:
[...]
现在当我通过onClick ="" ; checkAll（this.form，name）部分我去：
[...]
Now when I pass the onClick=""checkAll(this.form,name) part I go to:
您可以传递对复选框的引用作为JS函数的参数：
onclick =" checkAll（this）"
并修改功能：
function checkAll（checkbox）{
var myForm = checkbox.form;
if（checkbox.checked）/ *无需与真实比较
（如果勾选复选框）你的陈述是if（true == true），if（true）就够了！* /
//等等
}
HTH
-
YD
You may pass a reference to the checkbox as argument of the JS function :
onclick="checkAll(this)"
and modify the function that way :
function checkAll(checkbox){
var myForm=checkbox.form;
if(checkbox.checked) /* no need to compare to true
(if checkbox is checked your statement is if(true==true), if(true) is enough! */
//etc.
}
HTH
--
Y.D.
这也行不通。我收到的错误是什么：
错误，''已检查''为空或不是对象
检查是否是任何复选框的一部分是HTML，我不喜欢我不知道这个
是什么意思。请帮助。
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This also does not work. I get an error what says:
Error, ''checked'' is null or not an object
Check is a part of any checkbox is HTML and I don''t know what this
means. Please help.
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