Check box .....

Hi, i have a problem. Can someone help me please......

I want to check every checked checkbox in one form. The name is almost same, only last character not, can i use for loop to check it?? The for loop is like below...

var checkcount;
function checktech()
{
for (i=1; i<27; i++)
{
var the_box = document.form1.techbox[i];
if(the_box.checked == true)
{
checkcount = checkcount+1;
}
if(checkcount > 3)
{
alert("Please select no more than 3 option.");
}
}//end for
}//end function

<input type="checkbox" name="techbox1" onClick="checktech();" value="eq" >

<input type="checkbox" name="techbox2" onClick="checktech();" value="ga">
....
....
until 26 check box

Change

var the_box = document.form1.techbox[i];

by

var the_box = eval('document.form1.techbox'+i);

and I think that it will work