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scriptlet in javascript

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scriptlet in javascript

May 26th, 2009

hii..
I want to use a scriplet variable in javascript.
i used
<%! int i;>
<% i=0; %>
<input type="text" id="itemValue" onchange=changeValue('<%i%>')>

it works fine if i give alert(i) in
changeValue function.
Otherwise it gives error i is undefined.
Plz help me. I don't want to bother user by increasing one user click.
Plz help what is the reason ????

i m using struts 1.2

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Re: scriptlet in javascript

May 26th, 2009

Try this:
changeValue('<%=i%>')

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Re: scriptlet in javascript

May 27th, 2009

•

Originally Posted by javaAddict

Try this:
changeValue('<%=i%>')

Thanks for reply....
It's not working..
when i first time load my project it gives me error like i is undefined
But after giving an alert it works fine...

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Re: scriptlet in javascript

May 27th, 2009

•

Originally Posted by mamatachaudhari

Thanks for reply....
It's not working..
when i first time load my project it gives me error like i is undefined
But after giving an alert it works fine...

What do you mean giving an alert. Post the code that works

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Re: scriptlet in javascript

May 27th, 2009

•

Originally Posted by javaAddict

What do you mean giving an alert. Post the code that works

This is my input text field

 Help with Code Tags 
 JSP Syntax (Toggle Plain Text) 
<input type="text" id="productQuantity" size="5"  onchange="changeQuantity(this.form,'<bean:write property="productCode" name="product"/>','<%=z %>');"/>
<input type="text" id="productQuantity" size="5"  onchange="changeQuantity(this.form,'<bean:write property="productCode" name="product"/>','<%=z %>');"/>

And this is my javaScript function is..

 Help with Code Tags 
 JavaScript Syntax (Toggle Plain Text) 
function changeQuantity(form,productCode,index)
			{
				//alert("z==="+productCode);
				lengthOfItems=form.productCombo.options.length;
				lengthOfProducts=form.productCombo2.options.length;
alert("index"+index);
changeItemValueNew(form,productCode,index);
}
function changeQuantity(form,productCode,index)
			{
				//alert("z==="+productCode);
				lengthOfItems=form.productCombo.options.length;
				lengthOfProducts=form.productCombo2.options.length;
alert("index"+index);
changeItemValueNew(form,productCode,index);
}

after giving that alert messsage it works otherwise not.

}

Last edited by peter_budo; May 27th, 2009 at 11:01 am. Reason: Keep It Organized - For easy readability, always wrap programming code within posts in [code] (code blocks) and [icode] (inline code) tags.

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Re: scriptlet in javascript

May 27th, 2009

First of all describe better what do you mean by this:
after giving that alert messsage it works otherwise not.

Also, firstly does the method being called correctly?

Try this to check the above:

 Help with Code Tags 
 JSP Syntax (Toggle Plain Text) 
function changeQuantity(form,productCode,index)
{
alert("Method called");
}
function changeQuantity(form,productCode,index)
{
alert("Method called");
}

Then see if the arguments are passed correctly:

 Help with Code Tags 
 JSP Syntax (Toggle Plain Text) 
function changeQuantity(form,productCode,index)
{
alert(productCode);
alert(index);
}
function changeQuantity(form,productCode,index)
{
alert(productCode);
alert(index);
}

Then try your code with alert messages between the other commands (like debugging) to see what is wrong

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Re: scriptlet in javascript

May 27th, 2009

Create the variable in the javaScript
and store the value in it
then use it

 Help with Code Tags 
 JSP Syntax (Toggle Plain Text) 
function changeQuantity(form,productCode,index)
{
 var   z=productCode;
var y=index;
lengthOfItems=form.productCombo.options.length;
lengthOfProducts=form.productCombo2.options.length;
alert("index"+index);
changeItemValueNew(form,z,y);
}
function changeQuantity(form,productCode,index)
{
 var   z=productCode;
var y=index;
lengthOfItems=form.productCombo.options.length;
lengthOfProducts=form.productCombo2.options.length;
alert("index"+index);
changeItemValueNew(form,z,y);
}

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Re: scriptlet in javascript

May 27th, 2009

•

Originally Posted by amarjeetsingh

Create the variable in the javaScript
and store the value in it
then use it
Help with Code Tags

JSP Syntax (Toggle Plain Text)
 var   z=productCode;
var y=index;
var z=productCode; var y=index;

I don't believe that it will solve the problem. If this will execute correctly:

Help with Code Tags

JSP Syntax (Toggle Plain Text)

var   z=productCode;
 
changeItemValueNew(form,z,y)

then this will also:

Help with Code Tags

JSP Syntax (Toggle Plain Text)

changeItemValueNew(form,productCode,index);

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Re: scriptlet in javascript

May 27th, 2009

Create the variable in the javaScript
and store the value in it
then use it

 Help with Code Tags 
 JSP Syntax (Toggle Plain Text) 
function changeQuantity(form,productCode,index)
{
 var   z=productCode;
var y=index;
lengthOfItems=form.productCombo.options.length;
lengthOfProducts=form.productCombo2.options.length;
alert("index"+y);
changeItemValueNew(form,z,y);
}
function changeQuantity(form,productCode,index)
{
 var   z=productCode;
var y=index;
lengthOfItems=form.productCombo.options.length;
lengthOfProducts=form.productCombo2.options.length;
alert("index"+y);
changeItemValueNew(form,z,y);
}

if you do calulation in java script, then you must be attentative
about the data type of the variable

java script is not strictly check the datatype of the variable

i do n't know what have you done in

Help with Code Tags

JSP Syntax (Toggle Plain Text)

changeItemValueNew(form,z,y)

method

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Re: scriptlet in javascript

#10

May 27th, 2009

•

Originally Posted by amarjeetsingh

i do n't know what have you done in
Help with Code Tags

JSP Syntax (Toggle Plain Text)
changeItemValueNew(form,z,y)
changeItemValueNew(form,z,y)
method

We still don't know if the code before the call of that method is executed