function CalcTotal(who) {
var total = 0;
if (who.value == "" || who.value < 1 ) who.value = 1;
for(var ii=0; ii<document.frm.crpts.length; ii++) { 
if (document.frm.crpts[ii].checked) total += parseFloat(document.frm.crpts[ii].value) * parseFloat(document.frm.qnt[ii].value); 
}
if (total > 0) document.frm.total.value = "£" + total + ".00"; else document.frm.total.value = "";
}