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Struts 1 - JSP - html:optionsCollection inside function of javascript didn't work

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Hi Ranchers,
I have a problem using <html: optionsCollection ..> element inside function of javascript.
I want to display a <div class="row"> which consist of list of Material name in dropdown button and the input text for Percentage(%) of the material choosen.
We can add more of that div-row by clicking 'add' button. So I make a javascript function that can create another div-row after click the button.

The function of javascript is below:

The problem is the <html: optionsCollection ..> element always make the javascript can't be executed.
If I click the 'add' button, nothing happened.
If I delete those part, the dropdown is displayed but there's no value of material name appears. I need that part for displaying the material name, but it didn't work inside js.

Any idea why it's happened? Need your help please..
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