function AutoTab(x_tb, x_intLen) 
{
	if (navigator.appName=="Microsoft Internet Explorer")
	{
		if(x_tb.value.length >= x_intLen) 
		{
			x_tb.value = x_tb.value.slice(0, x_intLen);
			x_tb.form[(getIndex(x_tb)+1) % x_tb.form.length].focus();
		}
	}
}
		
function getIndex(x_FormItem) 
{
	var intIndex = -1;
	var i = 0;
		
	while (i < x_FormItem.form.length && intIndex == -1)
		if (x_FormItem.form[i] == x_FormItem)
			intIndex = i;
		else 
			i++;
		
	return intIndex;
}