var isNN = (navigator.appName.indexOf("Netscape")!=-1);
			function autoTab(input,len, e) {
				var keyCode = (isNN) ? e.which : e.keyCode; 
				var filter = (isNN) ? [0,8,9,16] : [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();
                    if (input.form[(getIndex(input) + 1) % input.form.length].type === "hidden") 
                        input.form[((getIndex(input) + 1) % input.form.length)+1].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;
			}