/* ================================================================
 * GLOBAL.JS
 * DESCRIPTION:
 *  - Common global javascript functions
 * ================================================================ */


// BrowserCheck Object
function BrowserCheck() {
	var b = navigator.appName
	if (b=="Netscape") this.b = "ns"
	else if (b=="Microsoft Internet Explorer") this.b = "ie"
	else this.b = b
	this.version = navigator.appVersion
	this.v = parseInt(this.version)
	this.ns = (this.b=="ns" && this.v>=4)
	this.ns4 = (this.b=="ns" && this.v==4)
	this.ns5 = (this.b=="ns" && this.v==5)
	this.ie = (this.b=="ie" && this.v>=4)
	this.ie4 = (this.version.indexOf('MSIE 4')>0)
	this.ie5 = (this.version.indexOf('MSIE 5')>0)
	this.min = (this.ns||this.ie)
}
is = new BrowserCheck()


function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
		result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
	if (formField.value == "")
	{
		alert(fieldLabel + ' is required.');
		formField.focus();
		return false;
	}	
	return true;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
			return false;
	return true;
}

function validEmail(formField,fieldLabel,required)
{
	if (required && !validRequired(formField,fieldLabel))
		return false;
	if ( (formField.value.length < 3) || !isEmailAddr(formField.value) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		return false;
	}  
  return true;
}

function validNum(formField,fieldLabel,required)
{
	if (required && !validRequired(formField,fieldLabel))
		return false;  
	if (!allDigits(formField.value))
 	{
 		alert('Please enter only numeric characters for the "' + fieldLabel +'" field.');
		formField.focus();		
		return false;
	}
	return true;
}

function validNumLen(formField,fieldLabel,minlen,required)
{
	if (required && !validRequired(formField,fieldLabel))
		return false;  
	if (!allDigits(formField.value))
 	{
 		alert('Please enter only numeric characters for the "' + fieldLabel +'" field.');
		formField.focus();		
		return false;
	}
	if (required && formField.value.length < minlen)
	{
	 	alert(fieldLabel + ' must be at least ' + minlen + ' characters long. ' );
		formField.focus();		
		return false;
	}
	return true;
}

function validInt(formField,fieldLabel,required)
{
	if (required && !validRequired(formField,fieldLabel))
		return false;  
	var num = parseInt(formField.value,10);
 	if (isNaN(num))
 	{
 		alert('Please enter only numeric characters for the "' + fieldLabel +'" field.');
		formField.focus();		
		return false;
	}	
	return true;
}

function validCurrency(formField,fieldLabel,required)
{
	if (required && !validRequired(formField,fieldLabel))
		return false;  
	if (!inValidCharSet(formField.value,"0123456789$,."))
 	{
 		alert('Please enter a number value for the "' + fieldLabel +'" field.');
		formField.focus();		
		return false;
	}
	return true;
}

function validPhone(formField,fieldLabel,required)
{
	if (required && !validRequired(formField,fieldLabel))
		return false;  
	if (!inValidCharSet(formField.value,"0123456789-(). "))
 	{
 		alert('Please enter a valid phone number "' + fieldLabel +'" field.');
		formField.focus();		
		return false;
	}
	return true;
}


function validDate(formField,fieldLabel,required)
{
	if (required && !validRequired(formField,fieldLabel))
		return false;  
 	var elems = formField.value.split("/"); 		
 	if (elems.length == 3)
 	{
 		var month = parseInt(elems[0],10);
  	var day = parseInt(elems[1],10);
 		var year = parseInt(elems[2],10);
		if (!(allDigits(elems[0]) && (month > 0) && (month < 13) &&
					allDigits(elems[1]) && (day > 0) && (day < 32) &&
					allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4) )))
		{
			alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
			return false;
		}
 	}
	return false;
}