JavaScript Validation for notes

HCL Domino Domino Forum
1

Hi there,

Can anyone see the reason why the length of “…question…” form elements which in my form are dialog list keep showing up as having an undefined length within the following code?

var form = document.forms[0];

// Outer loop moves through the fields/elements of the form

for (var h=0; h < form.elements.length; h++) {

var element = form.elements[h];

//var eName = element.name;

alert("*E length: " + element.length + " E name: " + element.name);



// Checks if the field name begins with 'question' and isn't the same as the previous field name

if((element.name.substring(0, 8) == "question") && (form.prevElement.value != element.name)) {

	//alert("in" + eName  + " : prev " + form.prevElement.value);

	

	// Check to see if an option has been chosen

	rb = false;

	alert("Element: " + element.length);

	 

	for (i = 0; i < element.length; i++) {

	  	//if (element[i].checked) {

	        	//rb = true;

	  	//}

	  	alert("for loop");

	}

	// Display a warning message if no option was chosen

	if (rb == false) {

		var qNum = element.name.substring(9, 8);

		alert("Please select an option from Question " + qNum);

		//element[0].focus();

		return false;

	}	

	

}



form.prevElement.value = element.name;

}

The line of code:

alert("Element: " + element.length);

states that element.length is undefined ( this refers to the question elements of the form), but if I put in the elements full name:

form.question1Ans.length

then the correct length is returned.

Any feedback on this would be very much appreciated.

Regards

M

2

Subject: JavaScript Validation for notes

When you iterate through form.elements you are looking at individual tags; when you get the form elements by name, you get all of the tagged elements with that name as a collection. It’s the difference between walking down a line-up of Boy Scouts and asking each if his name is Sam on the one hand and asking all of the kids named Sam to step forward on the other.