function copyform(a,b,c){
var i=0;
if(document.forms[a].elements[b].checked==true){
while (i<c.length){
document.forms[a].elements[c[i+1]].value = document.forms[a].elements[c[i]].value;
i=i+2;
}
}
else{
while (i<c.length){
document.forms[a].elements[c[i+1]].value = '';
i=i+2;
}
}
}