var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
var keyCode = (isNN) ? e.which : e.keyCode; 
var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
if(input.value.length >= len && !containsElement(filter,keyCode)) {
input.value = input.value.slice(0, len);
input.form[(getIndex(input)+1) % input.form.length].focus();
}
function containsElement(arr, ele) {
var found = false, index = 0;
while(!found && index < arr.length)
if(arr[index] == ele)
found = true;
else
index++;
return found;
}
function getIndex(input) {
var index = -1, i = 0, found = false;
while (i < input.form.length && index == -1)
if (input.form[i] == input)index = i;
else i++;
return index;
}
return true;
}









function cusvalid(form)
{
	var section_code,distrib_code,service_no;
	section_code=form.sec.value;
	distrib_code=form.dist.value;
	service_no=form.serno.value;
	if(section_code=="" || section_code.length<3 || section_code==0)
	{
		alert ("Enter Valid Section Code");
		form.sec.focus();
		return false;
	}
	if(distrib_code=="" || distrib_code.length<3 || distrib_code==0)
	{
		alert ("Enter Valid Distribution Code");
		form.dist.focus();
		return false;
	}
	if(service_no=="" || service_no==0)
	{
		alert ("Enter Valid Service Number");
		form.serno.focus();
		return false;
	}
}