work = new Array(8);
work[0]=0;
work[1]=0;
work[2]=0;
work[3]=0;
work[4]=0;
work[5]=0;
work[6]=0;
work[7]=0;

function chsum(tt,nn) {
work[eval(tt.charAt(1)) - 1] = nn;
document.chlist.ans.value = 0;
for (i=0; i<8; i++) {
document.chlist.ans.value = eval(document.chlist.ans.value) + eval(work[i]);
}
}