JS error

There is not such error in this code?

Share complete code or share url of page to check.

this is inside a form

			<SELECT multiple size="7" name="testCategory" > 
			      <option value="volvo">Volvo</option>
                  <option value="saab">Saab</option>
                  <option value="mercedes">Mercedes</option>
                  <option value="audi">Audi</option>
			</SELECT> 
			    			<INPUT onclick="AddListElements(this.form,"testCategory")" type=button value=">>">

Select allOpen in new window

thanks

Here problem is " in onclick replace it by ':

<INPUT onclick="AddListElements(this.form, 'testCategory')" type=button value=">>11">

Thank you very much

When I show alert(list.length);, it shows 12, why does it show 12? I thought there are only 4?

then the error shows

Uncaught TypeError: Cannot read property '11' of undefined


I am sorry if the answer is too obvious.  thanks

Please tell us what you are trying to do?

sorry about that. here is the code. When I select items from the left and press ">>", the slected items should go to the right side.  

I am getting "Uncaught TypeError: Cannot read property '11' of undefined"


thanks

<form name="form1">

<SELECT multiple size="7" name="testCategory" > 
			      <option value="volvo">Volvo</option>
                  <option value="saab">Saab</option>
                  <option value="mercedes">Mercedes</option>
                  <option value="audi">Audi</option>
			</SELECT> 
			    			<INPUT onclick="AddListElements(this.form,'testCategory')" type=button value=">>">
			    			
			    			
<SELECT  CLASS="AdHoc_Form_RIGHT" multiple size=17 name=mainlist></SELECT> 			    			
			    			</form>
			    			
			    			
<script>

    function AddListElements(frm, list) {
        if (list.length != 0) {
            var eArray = new Array();
            var tArray = new Array();
            //looks for all the selects on the left side that contains selected items
            for (var j = list.length - 1; j >= 0; j--) {
                value = list.options[j].value;
                text = list.options[j].text;
                eArray[countElements] = value;
                tArray[countElements] = text;
                if (!isInArray(value, lArray)) {
                    lArray[countElements][0] = list.options[j].value;
                    lArray[countElements][1] = list.name;
                    lArray[countElements][2] = 1;
                    lArray[countElements][3] = list.options[j].text;
                }
                RemoveOption(list, j);
                DecrementIndexes(list.name);
                countElements++;
            }
            for (var j = eArray.length - 1; j >= 0; j--) {
                if (eArray[j] != null) {
                    AddOption(frm.mainlist, eArray[j], tArray[j]);
                    eArray[j] = null;
                    tArray[j] = null;
                    IncrementIndexes("mainlist");
                }
            }
        }
    }
</script>

Select allOpen in new window

Thank you

list is a string - you are passing the string 'testCategory' to the function - not the actual control.

Therefore, when you do list.length it is giving you the length of the string 'testCategory' - not the length of the list.

I see.  Thanks for the direction.