Dynamic textbox movement

I have a textbox in a JSP file that appears only when a particular value is selected in a listbox. This has been done through Javascript.
Now, when the textbox is added, the whole form moves down.
How to eliminate this movement?
Following's the Javascript code:
function textBox(areaName, submitted)
var spanTxtID = document.getElementById('insertTxtSpan');
var txtSpan = document.getElementById('txtSpan');
var areaNameText=document.createElement('input');
areaNameText.setAttribute('type', 'text');
areaNameText.setAttribute('name', 'areaNameText');
areaNameText.setAttribute('maxLength', 20);
areaNameText.setAttribute('size', '30');
areaNameText.setAttribute('height', '21.3');
if(areaName.value=="Other")
submitted=false;
while(errSpan.hasChildNodes()) errSpan.removeChild(errSpan.lastChild);
while(txtSpan.hasChildNodes()) txtSpan.removeChild(txtSpan.lastChild);
while(spanTxtID.hasChildNodes()) spanTxtID.removeChild(spanTxtID.lastChild);
spanTxtID.appendChild(areaNameText);
else
submitted=false;
while(errSpan.hasChildNodes()) errSpan.removeChild(errSpan.lastChild);
while(txtSpan.hasChildNodes()) txtSpan.removeChild(txtSpan.lastChild);
while(spanTxtID.hasChildNodes()) spanTxtID.removeChild(spanTxtID.lastChild);
}

Helo Ananth,
What i want is as i press one button i want one textbox object shuld appear on the canvas.I am not talking about the thing like we make one textbox and on click of button it must be visible.so i want to make a textbox dynamically or at runtime it shuld appear.
TQ
Vivek

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move the <% int m=0;%> out of the loop.. You have place it in the loop, causing it to be initialize to be 0 each time the looping occurs.
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*^^*

An instructor at a summer camp told me to avoid scenes, so
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