Need help with a generic function

greyone · Feb 6, 2001

i have written a generic function to check if the fields are empty or not in the page. Now the problem is that i want check for multiple empty fields. I really don't know how can i modify the below function to incorporate this. Please help

function checkIfEmpty(formNo,elementName,alertMessage,location)
{
if (document.forms[formNo].elements[elementName].value=="&quot

{
alert(alertMessage);
return false;
}
else{
window.location=location;
return true;
}
}

Kirilla · Feb 6, 2001

Hi.

When do you call this method? What event or element call this? Could you write a more detailed description about it to my email?
tibor.kircsi@scala.hu

regards, Kirilla

greyone · Feb 6, 2001

I call this onclick of the button as follows:

<input name="ldate">
<input type="button" Value="Next" name="next" onClick="checkIfEmpty(0,'lDate','some mssg','hello.html')">

Kirilla · Feb 6, 2001

Hi.

I think, you have to add more variable to your function like this:

If you use && operator all of your element value must be equal "" to send an alert.
If you use || operator then you will get alert when one of them value is equal "".

function checkIfEmpty(formNo,elementName1,elementName2,...,elementNameXY,alertMessage,location)
{
if (document.forms[formNo].elements[elementName1].value=="" || document.forms[formNo].elements[elementName2].value=="" || ....)
{
alert(alertMessage);
return false;
}
else{
window.location=location;
return true;
}
}

<input name="ldate">
<input name="ldate2">
<input type="button" Value="Next" name="next" onClick="checkIfEmpty(0,'lDate','lDate2','some mssg','hello.html')">

OR another way:

function checkIfEmpty(formNo,elementName1,elementName2,...,alertMessage,location)
{
if (document.forms[formNo].elements[elementName1].value=="&quot

{
alert(alertMessage);
return false;
}else{
if (document.forms[formNo].elements[elementName2].value=="&quot

{
alert(alertMessage);
return false;
}else{
window.location=location;
return true;
}
}
.....

Loop if statements.

regards, Kirilla

greyone · Feb 6, 2001

But is there no other way to count the number of elements in the function and depending on the element display an appropriate alert message.
Is there a way in which the user just has to specify the number of elements and the alert message for each element.
Will the arguments property of the function help in this case. Please let me know

Kirilla · Feb 6, 2001

Hi.

Here is a dynamic checking for the elements value:

<html>
<Script Language="JavaScript">

function ff()
{
var num=document.forms["mm"].all.length;
var elements=document.forms["mm"].all;

for(i=0;i<num;i++){
alert(elements[ i ].value);
}
}

</Script>
<body>
<Form name="mm" id="mm">
<input type=text name="myElem">
<input type=text name="myElem">
<input type=text name="myElem">
<input type=text name="myElem">
</Form>
<input type="button" value="kkk" onclick="ff()">
</body>
</html>

regards, Kirilla

greyone · Feb 6, 2001

thanks a lot for the reply Kirilla

But i want the user to pass arguments in the function and check for empty only for those fields which is specified in the function other than the entire document.

GIGN · Feb 6, 2001

the arguments you pass to a function are held in an array called arguments:

function checker(){
for(var 1=0;i<arguments.length){
//do your things
}

}

-BB "Alright whatever man, I'll hook up the hair, but I aint touchin the ring...Cause I'm still a pla--yer"

GIGN · Feb 6, 2001

well I forgot the i++, but you dig me right? "Alright whatever man, I'll hook up the hair, but I aint touchin the ring...Cause I'm still a pla--yer"

Kirilla · Feb 6, 2001

Hi.

It will not check the entire document, it checks only those elements which are on the form called "mm" and has the "myElem" name. You can recognize the 1st, the 2nd and all of these elements and personalize an privat alert or anything else.

regards, Kirilla

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Need help with a generic function

greyone

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greyone

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greyone

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