How to pass three arguments in a function. PLEase help

unixxxx · Oct 23, 2002

I have problems with this code:

If i only called the first form, it will work correctly. But how do I call the second argument and third argument in the same function?

Please advice. THanks.

form name="Form">
Enter a number between 5 and 45: <input type="text" name="Field" size="5">
<input type="button" value="Check & Alert" onClick="CheckValue()"> <br>
Enter a number between -123 and 467: <input type="text" name="Field" size="5">
<input type="button" value="Check & Prompt" onClick="CheckValue()"> <br>

</form>

<SCRIPT>
function CheckValue(a,upper,lower)
{
a = eval(document.Form.Field.value)
upper=eval(document.Form.Field2.value)

if ( a >= 5 && a <= 45) {
alert("You are OK.&quot

}
else {
alert("You are not OK.&quot

}
if (upper<-123 && upper>467){
prompt("You are not OK.&quot

}

</SCRIPT>

starway · Oct 23, 2002

Remove the following lines from the function:
a = eval(document.Form.Field.value)
upper=eval(document.Form.Field2.value)

And do this:
<input type="button" ... onClick="CheckValue(document.Form1.Field1.value, document.Form.Field2.value)">

I don't see where is the need in 3rd parameter - you don't use it.

unixxxx · Oct 23, 2002

I actually need three arguments in a function. I need to create one function that will check any field to see if its value is within a range and return a true or false value The function should expect three arguments:
the name of the field (form object)
the lower limit
the upper limit

And I am doing it this way:
function alertCheck()
{
a = document.myForm.field1.value;
if(5<=a && a<=45)
{
alert("'" + a + "' is Right!&quot

;
}
else
{
alert("'" + a + "' is Wrong! pls enter again&quot

;
}
}

function promptCheck()
{
b = document.myForm.field2.value;

if(-123<=b && b<=467)
{
prompt("'" + b + "' is Right!&quot

;
// promptValue = prompt("'" + b + "' is Wrong! Pls try again&quot

;
// if (-123>=b && b>=467) continue
// break;
}
else
{
bValue = prompt("'" + b + "' is Wrong! Pls try again&quot

;
if (-123<=bValue && bValue<=467)
{
alert("Thank You&quot

;
}
else
{
alert("Nope, try again in the main page&quot

;
}
}
}

function statusCheck()
{
c = document.myForm.field3.value;
if(1<=c && c<=3)
{
window.status ="'" + c + "' is Right!";
}
else
{
window.status ="'" + c + "' is Wrong!";
}
}

Is there any way I can combine these 3 functions into one? means there are three arguments in a function, instead of each argument in a function?

Thanks a lot

spewn · Oct 23, 2002

post the entire code, html and javascript...i'll hook it up.

- spewn

unixxxx · Oct 23, 2002

Thanks for the fast reply. Here is the whole code :

How do I put these three functions into a function with three arguments?

Thanks again

<html>
<head>
<title>Untitled Document</title>

<script type="text/javascript">
<!--
function alertCheck()
{
a = document.myForm.field1.value;
if(5<=a && a<=45)
{
alert("'" + a + "' is Right!&quot

;
}
else
{
alert("'" + a + "' is Wrong! pls enter again&quot

;
}
}

function promptCheck()
{
b = document.myForm.field2.value;

if(-123<=b && b<=467)
{
prompt("'" + b + "' is Right!&quot

;
// promptValue = prompt("'" + b + "' is Wrong! Pls try again&quot

;
// if (-123>=b && b>=467) continue
// break;
}
else
{
bValue = prompt("'" + b + "' is Wrong! Pls try again&quot

;
}
}

function statusCheck()
{
c = document.myForm.field3.value;
if(1<=c && c<=3)
{
window.status ="'" + c + "' is Right!";
}
else
{
window.status ="'" + c + "' is Wrong!";
}
}
-->
</script>
</head>

<body bgcolor="#FFFFFF" text="#000000">
<FORM NAME="myForm">

Enter a number between 5 and 45: <INPUT TYPE="TEXT" SIZE="10" NAME="field1">
<INPUT TYPE="BUTTON" NAME="button1" VALUE="Check&Alert" onClick="alertCheck()"><br>

Enter a number between -123 and 467: <INPUT TYPE="TEXT" SIZE="10" NAME="field2">
<INPUT TYPE="BUTTON" NAME="button2" VALUE="Check&Prompt" onClick="promptCheck()"><br>

Enter a number between 1 and 3: <INPUT TYPE="TEXT" SIZE="10" NAME="field3">
<INPUT TYPE="BUTTON" NAME="button2" VALUE="Check&Status" onClick="statusCheck()"><br>

</FORM>

</body>
</html>

spewn · Oct 23, 2002

how about...

***
<html>
<head>
<title>Untitled Document</title>

<script type="text/javascript">
<!--

function checkValue(x) {

a = document.myForm.field1.value;
b = document.myForm.field2.value;
c = document.myForm.field3.value;

if ((x=='button1')&&(a!='')) {

if(a>=5 && a<=45) {alert("'" + a + "' is Right!&quot

;}
else {alert("'" + a + "' is Wrong! pls enter again&quot

;}
}

if ((x=='button2')&&(b!='')) {

if(b>=-123 && b<=467) {alert("'" + b + "' is Right!&quot

;}
else {alert("'" + b + "' is Wrong! pls enter again&quot

;}
}

if ((x=='button3')&&(c!='')) {

if(c>=1 && c<=3) {alert("'" + c + "' is Right!&quot

;}
else {alert("'" + c + "' is Wrong! pls enter again&quot

;}
}

}

-->
</script>
</head>

<body bgcolor="#FFFFFF" text="#000000">
<FORM NAME="myForm">

Enter a number between 5 and 45: <INPUT TYPE="TEXT" SIZE="10" NAME="field1">
<INPUT TYPE="BUTTON" NAME="button1" VALUE="Check&Alert" onClick="checkValue(name)"><br>

Enter a number between -123 and 467: <INPUT TYPE="TEXT" SIZE="10" NAME="field2">
<INPUT TYPE="BUTTON" NAME="button2" VALUE="Check&Prompt" onClick="checkValue(name)"><br>

Enter a number between 1 and 3: <INPUT TYPE="TEXT" SIZE="10" NAME="field3">
<INPUT TYPE="BUTTON" NAME="button3" VALUE="Check&Status" onClick="checkValue(name)"><br>

</FORM>

</body>
</html>
***

hope that helps...

- spewn

unixxxx · Oct 25, 2002

Hi,

If the function is writtten t his way:
function checkValue(x)

does it means that it only has one argument? How do I make it into three arguments such as the name of the field, lower limit, and upper limit?

Please help. THanks.

starway · Oct 25, 2002

If you had paid attention to my post, you could see this.

You had it already:
function CheckValue(a,upper,lower)

You should call it like this:
... onClick="CheckValue(document.myForm.field1.value, document.myForm.field2.value, document.myForm.field3.value)"

unixxxx · Oct 26, 2002

Thanks for your help. I did try that and I guess what it did was it loops and check all fields instead of only checking a field when user presses the button.

Any clue will be appreciated. Thanks.

unixxxx · Oct 26, 2002

In fact, I just wonder if it is possible to check only a field in a form instead of checking all fields as each field has each button.

Any clue?

unixxxx · Oct 26, 2002

Any reply will help . Thanks.

starway · Oct 27, 2002

I don't understand you.
You did it already - just looked at your first post. You checked that range for several form fields, and not all of them.
In general, this is what you need to do:

<form ... onsubmit="checkIt(this.txt1)">
...
<input type=text name="txt1">
...

This means that you pass the object of the text field to checkIt() function ("this" is a reference to the currect form). Then you should do the following:
function checkIt(field) {
if (field.value == "&quot

{
alert("it is empty!&quot

;
return false; // don't let the form to submit
}
}

So start from the beginning and explain your case clearly.
Also, I think it's a good idea to get a book about writing functions (in any programming language).

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How to pass three arguments in a function. PLEase help

unixxxx

MIS

starway

Programmer

unixxxx

MIS

spewn

Programmer

unixxxx

MIS

spewn

Programmer

unixxxx

MIS

starway

Programmer

unixxxx

MIS

unixxxx

MIS

unixxxx

MIS

starway

Programmer

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