//-------------------------------------------------------------------
// Author: Raul Morales <raulemofe@hotmail.com>
// WWW: http://www.morquechosdesign.com/
// Funciones de Validaciones en formularios
//-------------------------------------------------------------------
function Validacion(FormName, RequestRequiredBlank, RequestError, RequestOk) // Validación generica...
{
	var FormName=document.getElementById(FormName);
	var Elements=FormName.length;
	if(Elements>0)
	{
		for(var i=0; i<Elements; i++)
		{
			var Class=FormName.elements[i].className;
			var Type=FormName.elements[i].type;
			FormName.elements[i].value=Trim(FormName.elements[i].value); // Quitamos los espacios en blanco a la derecha y a la izquierda y actualizamos el Contenido del campo...
			var Value=FormName.elements[i].value; // Obtenemos el Contenido ya sin espacios en blanco...
			var Name=FormName.elements[i].name;
			var Id=FormName.elements[i].id;
			//alert("Class: "+Class+";\nType: "+Type+";\nValue: "+Value+";\nName: "+Name+";\nId: "+Id);
			if(Class)
			{
				switch(Class)
				{
					case "InputTextEmailRequired": 
						if(Type=='text')
						{
							if(!Value) 
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								if(RequestRequiredBlank) { alert(RequestRequiredBlank); }
								FormName.elements[i].focus();
								return false;
							}
							else if(!ValidarEmail(Value))
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								FormName.elements[i].value='';
								if(RequestError) { alert("Formato de correo electrónico incorrecto!"); }
								FormName.elements[i].focus();
								return false;
							}
							else 
							{ 
								FormName.elements[i].style.border='1px solid #7f9db9';
								FormName.elements[i].className='InputTextEmailRequired'; 
							}
						}
					break;
					case "InputTextEmailNoRequired": 
						if(Type=='text')
						{
							if(!ValidarEmail(Value) && (Value))
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								if(RequestError) { alert("Formato de correo electrónico incorrecto!"); }
								FormName.elements[i].focus();
								return false;
							}
							else 
							{ 
								FormName.elements[i].style.border='1px solid #7f9db9';
								FormName.elements[i].className='InputTextEmailNoRequired'; 
							}
						}
					break;
					case "InputNumRequired":
						if(Type=='text')
						{
							if(!Value) 
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								if(RequestRequiredBlank) { alert(RequestRequiredBlank); }
								FormName.elements[i].focus();
								return false;
							}
							else if(!isInteger(Value))
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								FormName.elements[i].value='';
								if(RequestError) { alert("Esto no es un número!\nNo debe contener Letras, comas, puntos, etc."); }
								FormName.elements[i].focus();
								return false;
							}
							else 
							{ 
								FormName.elements[i].style.border='1px solid #7f9db9';
								FormName.elements[i].className='InputNumRequired'; 
							}
						}
					break;
					case "InputNumNoRequired":
						if(Type=='text')
						{
							if(!isInteger(Value) && (Value))
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								FormName.elements[i].value='';
								if(RequestError) { alert("Esto no es un número!\nNo debe contener Letras, comas, puntos, etc."); }
								FormName.elements[i].focus();
								return false;
							}
							else 
							{ 
								FormName.elements[i].style.border='1px solid #7f9db9';
								FormName.elements[i].className='InputNumRequired'; 
							}
						}
					break;
					case "InputDateRequired":
						if(Type=='text')
						{
							if(!Value) 
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								if(RequestRequiredBlank) { alert("Escribe una fecha correcta!"); }
								FormName.elements[i].focus();
								return false;
							}
							else if(!isDate(Value,'dd/MM/yyyy'))
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								FormName.elements[i].value='';
								if(RequestError) { alert(RequestError); }
								FormName.elements[i].focus();
								return false;
							}
							else 
							{ 
								FormName.elements[i].style.border='1px solid #7f9db9';
								FormName.elements[i].className='InputNumRequired'; 
							}
						}
					break;
					case "InputDateNoRequired":
						if(Type=='text')
						{
							if(!isDate(Value,'dd/MM/yyyy') && (Value))
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								FormName.elements[i].value='';
								if(RequestError) { alert("Escribe una fecha correcta!"); }
								FormName.elements[i].focus();
								return false;
							}
							else 
							{ 
								FormName.elements[i].style.border='1px solid #7f9db9';
								FormName.elements[i].className='InputNumRequired'; 
							}
						}
					break;
					case "InputTextRequired": 
						if((Type=='text') || (Type=='textarea') || (Type=='password') || (Type=='select-one'))
						{
							if(!Value) 
							{ 
								FormName.elements[i].style.border='1px solid #CC3333';
								if(RequestRequiredBlank) { alert(RequestRequiredBlank); }
								FormName.elements[i].focus();
								return false;
							}
							else 
							{ 
								FormName.elements[i].style.border='1px solid #7f9db9';
								FormName.elements[i].className='InputTextRequired'; 
							}
						}
					break;
					case "InputButton": 
						if(Type=='submit' || Type=='button')
						{
							FormName.elements[i].disabled=true;
						}
					break;
					default: break;
				}
			}
		}
	}
	if(RequestOk) { alert(RequestOk); }
	return true;
}

function ValidarEmail(Email) // Valida el formato de un email(Email) dado...
{
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(Email)) { return true; } 
	else { return false; }
}

//-------------------------------------------------------------------
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
// Trim functions (Elimina los espacios vacios de un string)
//-------------------------------------------------------------------
function LTrim(str)
{
	if (str==null){return null;}
	for(var i=0;str.charAt(i)==" ";i++);
	return str.substring(i,str.length);
}

function RTrim(str)
{
	if (str==null){return null;}
	for(var i=str.length-1;str.charAt(i)==" ";i--);
	return str.substring(0,i+1);
}

function Trim(str){return LTrim(RTrim(str));}

function LTrimAll(str) 
{
	if (str==null){return str;}
	for (var i=0; str.charAt(i)==" " || str.charAt(i)=="\n" || str.charAt(i)=="\t"; i++);
	return str.substring(i,str.length);
}

function RTrimAll(str) 
{
	if (str==null){return str;}
	for (var i=str.length-1; str.charAt(i)==" " || str.charAt(i)=="\n" || str.charAt(i)=="\t"; i--);
	return str.substring(0,i+1);
}

function TrimAll(str) { return LTrimAll(RTrimAll(str)); }

//-------------------------------------------------------------------
// isNull(value) - Devuelve verdadero si el valor enviado es "null".
//-------------------------------------------------------------------
function isNull(val){return(val==null);}

//-------------------------------------------------------------------
// isBlank(value) - Devuelve verdadero si el valor enviado es vacío o contiene espacios en blanco.
//-------------------------------------------------------------------
function isBlank(val)
{
	if(val==null){return true;}
	for(var i=0;i<val.length;i++) 
	{
		if ((val.charAt(i)!=' ')&&(val.charAt(i)!="\t")&&(val.charAt(i)!="\n")&&(val.charAt(i)!="\r")){return false;}
	}
	return true;
}

//-------------------------------------------------------------------
// isInteger(value) - Devuelve verdaderos si todos los elementos del "val" son numeros.
//-------------------------------------------------------------------
function isInteger(val)
{
	if (isBlank(val)){return false;}
	for(var i=0;i<val.length;i++)
	{
		if(!isDigit(val.charAt(i))){return false;}
	}
	return true;
}

//-------------------------------------------------------------------
// isNumeric(value) - Devuelve verdadero si "val" es un numero
//-------------------------------------------------------------------
function isNumeric(val){return(parseFloat(val,10)==(val*1));}

//-------------------------------------------------------------------
// isArray(obj) - Devuelve verdadero si el objeto(obj) es un arreglo.
//-------------------------------------------------------------------
function isArray(obj){return(typeof(obj.length)=="undefined")?false:true;}

//-------------------------------------------------------------------
// isDigit(value) - Devuelve verdadero si el valor(num) es un digito numerico.
//-------------------------------------------------------------------
function isDigit(num) 
{
	if (num.length>1){return false;}
	var string="1234567890";
	if (string.indexOf(num)!=-1){return true;}
	return false;
}

//-------------------------------------------------------------------
// setNullIfBlank(input_object) - Sets a form field to "" if it isBlank()
//-------------------------------------------------------------------
function setNullIfBlank(obj) { if(isBlank(obj.value)){obj.value="";} }

//-------------------------------------------------------------------
// setFieldsToUpperCase(input_object) - Sets value of form field toUpperCase() for all fields passed
//-------------------------------------------------------------------
function setFieldsToUpperCase()
{
	for(var i=0;i<arguments.length;i++) { arguments[i].value = arguments[i].value.toUpperCase(); }
}

//-------------------------------------------------------------------
// disallowBlank(input_object[,message[,true]]) - Checks a form field for a blank value. Optionally alerts if blank and focuses
//-------------------------------------------------------------------
function disallowBlank(obj)
{
	var msg=(arguments.length>1)?arguments[1]:"";
	var dofocus=(arguments.length>2)?arguments[2]:false;
	if (isBlank(getInputValue(obj)))
	{
		if(!isBlank(msg)){alert(msg);}
		if(dofocus)
		{
			if (isArray(obj) && (typeof(obj.type)=="undefined")) {obj=obj[0];}
			if(obj.type=="text"||obj.type=="textarea"||obj.type=="password") { obj.select(); }
			obj.focus();
		}
		return true;
	}
	return false;
}

//-------------------------------------------------------------------
// disallowModify(input_object[,message[,true]]) - Checks a form field for a value different than defaultValue. - Optionally alerts and focuses
//-------------------------------------------------------------------
function disallowModify(obj)
{
	var msg=(arguments.length>1)?arguments[1]:"";
	var dofocus=(arguments.length>2)?arguments[2]:false;
	if (getInputValue(obj)!=getInputDefaultValue(obj))
	{
		if(!isBlank(msg)){alert(msg);}
		if(dofocus)
		{
			if (isArray(obj) && (typeof(obj.type)=="undefined")) {obj=obj[0];}
			if(obj.type=="text"||obj.type=="textarea"||obj.type=="password") { obj.select(); }
			obj.focus();
		}
		setInputValue(obj,getInputDefaultValue(obj));
		return true;
	}
	return false;
}

//-------------------------------------------------------------------
// commifyArray(array[,delimiter]) - Take an array of values and turn it into a comma-separated string - Pass an optional second argument to specify a delimiter other than comma.
//-------------------------------------------------------------------
function commifyArray(obj,delimiter)
{
	if (typeof(delimiter)=="undefined" || delimiter==null) 
	{
		delimiter = ",";
	}
	var s="";
	if(obj==null||obj.length<=0){return s;}
	for(var i=0;i<obj.length;i++)
	{
		s=s+((s=="")?"":delimiter)+obj[i].toString();
	}
	return s;
}

//-------------------------------------------------------------------
// getSingleInputValue(input_object,use_default,delimiter) - Utility function used by others
//-------------------------------------------------------------------
function getSingleInputValue(obj,use_default,delimiter) 
{
	switch(obj.type)
	{
		case 'radio': case 'checkbox': return(((use_default)?obj.defaultChecked:obj.checked)?obj.value:null);
		case 'text': case 'hidden': case 'textarea': return(use_default)?obj.defaultValue:obj.value;
		case 'password': return((use_default)?null:obj.value);
		case 'select-one':
			if (obj.options==null) { return null; }
			if(use_default)
			{
				var o=obj.options;
				for(var i=0;i<o.length;i++){if(o[i].defaultSelected){return o[i].value;}}
				return o[0].value;
			}
			if (obj.selectedIndex<0){return null;}
			return(obj.options.length>0)?obj.options[obj.selectedIndex].value:null;
		case 'select-multiple': 
			if (obj.options==null) { return null; }
			var values=new Array();
			for(var i=0;i<obj.options.length;i++) 
			{
				if((use_default&&obj.options[i].defaultSelected)||(!use_default&&obj.options[i].selected)) 
				{
					values[values.length]=obj.options[i].value;
				}
			}
			return (values.length==0)?null:commifyArray(values,delimiter);
	}
	alert("FATAL ERROR: Field type "+obj.type+" is not supported for this function");
	return null;
}

//-------------------------------------------------------------------
// getSingleInputText(input_object,use_default,delimiter) - Utility function used by others
//-------------------------------------------------------------------
function getSingleInputText(obj,use_default,delimiter) 
{
	switch(obj.type)
	{
		case 'radio': case 'checkbox': 	return "";
		case 'text': case 'hidden': case 'textarea': return(use_default)?obj.defaultValue:obj.value;
		case 'password': return((use_default)?null:obj.value);
		case 'select-one':
			if (obj.options==null) { return null; }
			if(use_default)
			{
				var o=obj.options;
				for(var i=0;i<o.length;i++){if(o[i].defaultSelected){return o[i].text;}}
				return o[0].text;
			}
			if (obj.selectedIndex<0){return null;}
			return(obj.options.length>0)?obj.options[obj.selectedIndex].text:null;
		case 'select-multiple': 
			if (obj.options==null) { return null; }
			var values=new Array();
			for(var i=0;i<obj.options.length;i++) 
			{
				if((use_default&&obj.options[i].defaultSelected)||(!use_default&&obj.options[i].selected)) 
				{
					values[values.length]=obj.options[i].text;
				}
			}
			return (values.length==0)?null:commifyArray(values,delimiter);
	}
	alert("FATAL ERROR: Field type "+obj.type+" is not supported for this function");
	return null;
}

//-------------------------------------------------------------------
// setSingleInputValue(input_object,value)
//   Utility function used by others
//-------------------------------------------------------------------
function setSingleInputValue(obj,value) 
{
	switch(obj.type)
	{
		case 'radio': case 'checkbox': if(obj.value==value){obj.checked=true;return true;}else{obj.checked=false;return false;}
		case 'text': case 'hidden': case 'textarea': case 'password': obj.value=value;return true;
		case 'select-one': case 'select-multiple': 
			var o=obj.options;
			for(var i=0;i<o.length;i++)
			{
				if(o[i].value==value){o[i].selected=true;}
				else{o[i].selected=false;}
			}
			return true;
	}
	alert("FATAL ERROR: Field type "+obj.type+" is not supported for this function");
	return false;
}

//-------------------------------------------------------------------
// getInputValue(input_object[,delimiter]) - Get the value of any form input field - Multiple-select fields are returned as comma-separated values, or delmited by the optional second argument 
// (Doesn't support input types: button,file,reset,submit)
//-------------------------------------------------------------------
function getInputValue(obj,delimiter) 
{
	var use_default=(arguments.length>2)?arguments[2]:false;
	if (isArray(obj) && (typeof(obj.type)=="undefined")) 
	{
		var values=new Array();
		for(var i=0;i<obj.length;i++)
		{
			var v=getSingleInputValue(obj[i],use_default,delimiter);
			if(v!=null){values[values.length]=v;}
		}
		return commifyArray(values,delimiter);
	}
	return getSingleInputValue(obj,use_default,delimiter);
}

//-------------------------------------------------------------------
// getInputText(input_object[,delimiter]) - Get the displayed text of any form input field - Multiple-select fields are returned as comma-separated values, or delmited by the optional second argument 
// (Doesn't support input types: button,file,reset,submit)
//-------------------------------------------------------------------
function getInputText(obj,delimiter) 
{
	var use_default=(arguments.length>2)?arguments[2]:false;
	if (isArray(obj) && (typeof(obj.type)=="undefined")) 
	{
		var values=new Array();
		for(var i=0;i<obj.length;i++)
		{
			var v=getSingleInputText(obj[i],use_default,delimiter);
			if(v!=null){values[values.length]=v;}
		}
		return commifyArray(values,delimiter);
	}
	return getSingleInputText(obj,use_default,delimiter);
}

//-------------------------------------------------------------------
// getInputDefaultValue(input_object[,delimiter]) - Get the default value of any form input field when it was created - Multiple-select fields are returned as comma-separated values, or 
// delmited by the optional second argument - (Doesn't support input types: button,file,password,reset,submit)
//-------------------------------------------------------------------
function getInputDefaultValue(obj,delimiter){return getInputValue(obj,delimiter,true);}

//-------------------------------------------------------------------
// isChanged(input_object) - Returns true if input object's value has changed since it was created.
//-------------------------------------------------------------------
function isChanged(obj){return(getInputValue(obj)!=getInputDefaultValue(obj));}

//-------------------------------------------------------------------
// setInputValue(obj,value) - Set the value of any form field. In cases where no matching value is available (select, radio, etc) then no option will be selected 
// (Doesn't support input types: button,file,password,reset,submit)
//-------------------------------------------------------------------
function setInputValue(obj,value) 
{
	var use_default=(arguments.length>1)?arguments[1]:false;
	if(isArray(obj)&&(typeof(obj.type)=="undefined"))
	{
		for(var i=0;i<obj.length;i++){setSingleInputValue(obj[i],value);}
	}
	else{setSingleInputValue(obj,value);}
}
	
//-------------------------------------------------------------------
// isFormModified(form_object,hidden_fields,ignore_fields) - Check to see if anything in a form has been changed. By default it will check all visible form elements and ignore all hidden  fields.  
// You can pass a comma-separated list of field names to check in addition to visible fields (for hiddens, etc). You can also pass a comma-separated list of field names to be ignored in the check.
//-------------------------------------------------------------------
function isFormModified(theform,hidden_fields,ignore_fields)
{
	if(hidden_fields==null){hidden_fields="";}
	if(ignore_fields==null){ignore_fields="";}
	var hiddenFields=new Object();
	var ignoreFields=new Object();
	var i,field;
	var hidden_fields_array=hidden_fields.split(',');
	for (i=0;i<hidden_fields_array.length;i++) 
	{
		hiddenFields[Trim(hidden_fields_array[i])]=true;
	}
	var ignore_fields_array=ignore_fields.split(',');
	for (i=0;i<ignore_fields_array.length;i++) 
	{
		ignoreFields[Trim(ignore_fields_array[i])]=true;
	}
	for (i=0;i<theform.elements.length;i++) 
	{
		var changed=false;
		var name=theform.elements[i].name;
		if(!isBlank(name))
		{
			var type=theform.elements[i].type;
			if(!ignoreFields[name])
			{
				if(type=="hidden"&&hiddenFields[name]){changed=isChanged(theform[name]);}
				else if(type=="hidden"){changed=false;}
				else {changed=isChanged(theform[name]);}
			}
		}
		if(changed){return true;}
	}
	return false;
}