How to enable onclick event for checkboxes dynamically?

[Man4ish]

Hi,

I need to generate check-boxes dynamically and enable onclick color change event for each check box. But I am unable to implement it by integrating Javascript code with Java.

// javascript code

out.println("<SCRIPT language= 'javascript' type='text/javascript'>function swapcol(item){if(document.getElementById(item).checked){document.getElementById(item+'bg').style.background='#D3D3D3'}else{document.getElementById(item+'bg').style.background='#FFFFFF'}}</SCRIPT>");

//Calling Javascript function

for (int i =1; i <= 1; i++)
{
     String divid = null;
     divid = Integer.toString(i);
     String ide = null;
     ide += "item";
     ide += Integer.toString(i);
     System.out.println(ide);
     out.println("<DIV id=" + '1' +">Checkbox 1:   <INPUT type='checkbox' id=" + "item1" + "name='checkbox' onclick= swapcol(" + "item1"+ ")></DIV>");
}

May i know where i am wrong? Thanks in advance.