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// $Id: Forms.js,v 1.2 2006/10/06 20:14:36 lsmith Exp $
/**
 * OO Basic form validation functions
 *
 * @category   HTML
 * @package    ENTICE_E_PBX
 * @author     Lance Smith
 * @copyright  2006 Emergent Network Solutions
 * @license    Emergent Network Solutions
 * @version    Release: @package_version@
 */

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;
}
function autoTab(input, e){
	var keyCode = (bNS4) ? e.which : e.keyCode;
	var filter = (bNS4) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
	if(input.value.length >= input.maxLength && !containsElement(filter,keyCode)){
		input.value = input.value.slice(0, input.maxLength);
		input.form[(getIndex(input)+1) % input.form.length].focus();
	}
return true;
}

function validateField(field,message,regexp){
	var bEmpty=false;
	var strAction='enter';
	var field_value='';
	var xField=(field.length>0 && !field.type)?field[0]:field;
	var selectedIndex=-1;

	switch(xField.type){
		case 'textarea':
		case 'hidden':
		case 'password':
		case 'file':
		case 'text':{
			field_value=field.value;
			bEmpty=(field_value.length<1);
			break;
		}
		case 'select-one':{
			if(field.selectedIndex>=0) field_value=field.options[field.selectedIndex].value;
			bEmpty=(field.selectedIndex<0 || field_value.length<1);
			strAction='select';
			break;
		}
		case 'checkbox':{
			strAction='select';
			bEmpty=!xField.checked;
			break;
		}
		case 'radio':{
			strAction='select';
			bEmpty=true;
			if(xField!=field){
				for(var intIdx=0;intIdx<field.length;intIdx++){
					if(field[intIdx].checked){
						bEmpty=false;
						selectedIndex=intIdx;
						break;
					}
				}
			}
			else
				bEmpty=xField.checked;
			break;
		}
		default:{
			bEmpty=true;
			alert('form element \''+xField.name+'\' ['+xField.type+'] is not supported by checkEmpty() function');
			break;
		}
	}

	if(regexp && !bEmpty){
		bEmpty=!regexp.test(field_value);
	}

	if(bEmpty){
		if(message) alert(message);
		else alert('Please '+strAction+' a value for field \''+xField.name+'\'');
		if(xField.type!='hidden') xField.focus();
	}

	return (xField.type=='radio')?selectedIndex:!bEmpty;
}

//Remove spaces from start and end of a string
function trim(value) {
   var temp = value;
   var obj = /^(\s*)([\W\w]*)(\b\s*$)/;
   if (obj.test(temp)) { temp = temp.replace(obj, '$2'); }
   var obj = / +/g;
   temp = temp.replace(obj, " ");
   if (temp == " ") { temp = ""; }
   return temp;
}

function ValidateNumeric(control){
	control.value=trim(control.value);
	if(!IsNumeric( control.value ) ){
		alert('Please enter numeric values only');
		control.focus();}}

function IsNumeric(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;
   for (i = 0; i < sText.length && IsNumber == true; i++){
      Char = sText.charAt(i);
      if (ValidChars.indexOf(Char) == -1){
         IsNumber = false;}}
   return IsNumber;}

function removeChar(Target){
	var re=/[^0-9]/g;
	Target=Target.replace(re,'');
	return Target;}

function removeNonNum(Target){
	var re=/[^0-9|\^.|\^-]/g;
	Target=Target.replace(re,'');
	return Target;}

function removeDigit(Target){
	var re=/[0-9]/g;
	Target=Target.replace(re,'');
	return Target;}

function IsEmail(strEmail)
{
	var status = false;
	var strEmailAddress = new String(strEmail);
	var strEmailPattern = (/^[a-z0-9](\.\w|\w)*@[a-z0-9](\.\w|\w)*\.[a-z]{2,3}$/i);

	if (strEmailAddress.search(strEmailPattern)==0)
	{
		status = true;
	}
	return status;
}

function IsCreditCard(strCC){
	strCC=removeChar(strCC);
	if(strCC.length<16) return false;
	if(strCC.length > 19) return false;

    sum = 0; mul = 1; l = strCC.length;
	for (i = 0; i < l; i++){
		digit = strCC.substring(l-i-1,l-i);
		tproduct = parseInt(digit ,10)*mul;
		if (tproduct >= 10) sum += (tproduct % 10) + 1;
		else sum += tproduct;
		if (mul == 1) mul++;
		else mul--;
	}
	if ((sum % 10) != 0) return false;

 	return true;
}

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