Infinite Loop

I have an array of text boxes in HTML. like

text1 textamt1 textamount1

text1 textamt1 textamount1
text1 textamt1 textamount1

The user enters some number in textamt1 box.

I write a method display() onblur of textamt1.

So as soon as enters a valur in textamt1 and blurs I need to perform some calculations and show it in textamount3

So i write a for loop in display() method of javascript. Before calculating I need to validate that the users enter a numeric nondecimal nonnegative number. If he enters a non valid value I show him an alert and breaks the for loop. But it is going to infinite loop even though i am breaking the loop.

Wha can be the problem??


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Michel PlungjanConnect With a Mentor IT ExpertCommented:
You may trigger the onBlur on the alert

ALways use guard flags or timeout with onBlur and onFocus

Well, going from the above information...

Make sure that your textboxes are not named the same.

Here is a same bit of code I have used within an asp page

given that yours might look like this.
     A     +     B     =     C
1txtamount1 1txtamount2 1txtamount3
2txtamount1 2txtamount2 2txtamount3
3txtamount1 3txtamount2 3txtamount3
   ...          ...         ...
ntxtamount1 ntxtamount2 ntxtamount3

function CheckIt(n){
tempnameA=n + "txtamount1";
tempnameB=n + "txtamount2";
tempnameC=n + "txtamount3";
document.all(tempnameC).value=eval(document.all(tempnameA).value) + eval(document.all(tempnameB).value);

Then just supply the first number (row number) on every texts onblur event.


Hope This Helps

Here's the bit to ensure that you have a non-negative integer:

function isInteger(strFieldName, lclMessage)
     var lclAt, strValue="";
     strValue = eval('document.formname.' + strFieldName + '.value');
     if(strValue.length !=0)
               alert("Please enter a valid number for  " + lclMessage + "." );
               eval('document.formname.' + strFieldName + ".focus()");
               return false;
               if (strValue<0)
                    alert("Please enter a positve value for " + lclMessage + ".");
                    return false;
               for (lclAt=0; lclAt < strValue.length+1; lclAt++)
                    if ((strValue.substring(lclAt,lclAt+1) == ',') || (strValue.substring(lclAt,lclAt+1) == '.'))
                         alert("Please round " + lclMessage + " to the nearest whole number (no decimals).");
                         eval('document.formname.' + strFieldName + ".focus()");
                         return false;
     return true;

Fritz the Blank
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I'm guessing you only get this error in Netscape, yes?

If this is the case, the cause is indeed the alert that triggers the onblur event, causing infinite loop - as mplungian previously stated:
>>You may trigger the onBlur on the alert
>>ALways use guard flags or timeout with onBlur and onFocus


To test if this is the problem, you could just make the onblur give an alert and nothing else:
<input type=text onblur="alert('foo');">
If the above goes in infinite loop, you've determined your problem.
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