function CheckForm(form)
{
	var i;
	var arr;
	var str;
	var x;
	var nameElement;
	var NumChars;
	
	for (i=0;i<form.elements.length;i++)
	{
		if(form.elements[i].name.substr(0,4) == "CHK_")
		{
			
			str = form(form.elements[i].name.substr(4)).value;
			
			if(str != null)
			{
				str = Trim(str);				
				arr = form.elements[i].value.split("|");
				nameElement = form.elements[i].name.substr(4);
				NumChars = arr[1];				
				NumChars = NumChars.length;
				
				switch(arr[0])
				{					
					case "STR":
						
						//check mandatory field
						if ((str.length == 0) && (arr[3] == "True"))
						{
							alert("Debe Ingresar -> " + arr[4]);
							form(nameElement).focus();
							return false;
						}
						
						if (Trim(str).length == 0 && (arr[3] == "True"))
						{
							alert("No se aceptan espacios -> " + arr[4]);
							form(nameElement).focus();
							return false;
						}
							
						//check min length
						if (str.length < parseInt(arr[1]))
						{
							alert("El valor en el campo: >" + arr[4] + "< es muy corto");
							form(nameElement).focus();
							return false;
						}

						//check max length
						if (str.length > parseInt(arr[2]))
						{
							alert("El valor en el campo >" + arr[4] + "< contiene más de los caractéres permitidos: " + arr[2]);
							form(nameElement).focus();
							return false;
						}
						break;
												
					case "INT":						

						//check mandatory field
						if ((str.length == 0) && (arr[3] == "True"))
						{
							alert("Debe Ingresar -> " + arr[4]);
							form(nameElement).focus();
							return false;
						}
						
						//check sanity
						if(!(IsNumeric(str)))
						{
							alert("El valor en el campo >" + arr[4] + "< debe ser numérico entero");
							form(nameElement).focus();
							return false;
						}
													
						//check min value
						
						if (parseInt(str) < parseInt(arr[1]))
						{
							alert("El Valor en el Campo >" + arr[4] + "< Debe ser de por lo menos " + NumChars + " Digitos");
							form(nameElement).focus();
							return false;
						}
							
						//check max length
						
						if (parseInt(str) > parseInt(arr[2]))
						{
							alert("El valor en el campo >" + arr[4] + "< es muy grande");
							form(nameElement).focus();
							return false;
						}
						
						//chequer que sea positivo
						if (str < 0)
						{
							alert("El valor en el campo >" + arr[4] + "< debe ser positivo");
							form(nameElement).focus();
							return false;							
						}
							
						break;
						
					case "FLOAT":
																			
						//check mandatory field
						if ((str.length == 0) && (arr[3] == "True"))
						{
							alert("El valor en el campo >" + arr[4] + "< debe ser Ingresado");
							return false;
						}
							
						//check sanity
						if(!(IsFloat(str)))
						{
							alert("El valor en el campo >" + arr[4] + "< debe ser Numérico");
							form(nameElement).focus();
							return false;
						}
													
						//check min value
						if (arr[1] != "x")
						{
							if (parseFloat(str) < parseFloat(arr[1]))
							{
								alert("El valor en el campo >" + arr[4] + "< es muy pequeño");
								return false;
							}
						}
							
						//check max length
						if (arr[2] != "x")
						{
							if (parseFloat(str) > parseFloat(arr[2]))
							{
								alert("El valor en el campo >" + arr[4] + "< es muy Grande");
								return false;
							}
						}
							
						break;
				
					case "DATE":
												
						//check mandatory field
						if ((str.length == 0) && (arr[3] == "True"))
						{
							alert("The field >" + arr[4] + "< must be filled in");
							return false;
						}
							
						//check sanity
						if(!(IsDate(str)))
						{
							alert("The value in field >" + arr[4] + "< is not a valid date (MM/DD/YYYY)");
							return false;
						}
							
						//check min value
						if (arr[1] != "x")
						{
							if (GetDate(str) < GetDate(arr[1]))
							{
								alert("The date in field >" + arr[4] + "< is less than the minimum date");
								return false;
							}
						}
							
						//check max length
						if (arr[2] != "x")
						{
							if (GetDate(str) > GetDate(arr[2]))
							{
								alert("The value in field >" + arr[4] + "< is later than the maximum date");
								return false;
							}
						}
					
						break;
						
					case "DATECBO":
					{
						if (form.dpwYear.value == "-1" ||
							form.dpwMonth.value == "-1" ||
							form.dpwDay.value == "-1")
							{
								alert("Debe Ingresar -> " + arr[4]);
								form.dpwYear.focus();
								return false;
							}						
					}
						
						
					case "CBO":

						//check value
						if ((str == "-1") || (str == "0") || (str == ""))
						{
							alert("Debe Seleccionar -> " + arr[4]);
							form(nameElement).focus();
							return false;
						}
					break;
					
					case "LSTM":

						//check value
						if ((str == "-1") || (str == "0") || (str == ""))
						{
							alert("Debe Seleccionar por lo menos un valor en -> " + arr[4]);
							form(nameElement).focus();
							return false;
						}
						break;
						
					case "HTM":						
						if ((str.length == 11) && (arr[3] == "True"))
						{
							alert("Debe Ingresar -> " + arr[4]);							
							return false;
						}
						break;
							
					case "EMAIL":
					{
						if (!IsEmail(str))
						{						
							alert("Debe Ingresar una Dirección de Email válida -> " + arr[4]);							
							form(nameElement).focus();							
							return false;
						}
					}
					break;
					
					
				}
			}
		}
	}

	return true;

}

//============================================================================================

function Replace(string,replacechar,replacewith) 
{
	var temp = "";
	var i;
		
	string = '' + string;
	splitstring = string.split(replacechar);
	for(i = 0; i < splitstring.length; i++)
	{
		if(i < (splitstring.length -1))
			temp += splitstring[i] + replacewith;
		else
			temp += splitstring[i];
	}
	return temp;
}

//============================================================================================

function GetFieldValueByName(form,name)
{
	var i;
		
	for (i=0;i<form.elements.length;i++)
	{
		if(form.elements[i].name == name)
			return (form.elements[i].value);
	}
	return null;
}

/*

======================= STANDARD HELPER FUNCTIONS BELOW =======================================

*/
function IsNumeric(str)
{
	var i;
	for(i=0;i<str.length;i++)
	{
		if(str.charAt(i) == ' ' || 
			str.charAt(i) == '.' || 
			str.charAt(i) == '-' ||
			!(str.charAt(i) >= '0' && str.charAt(i) <= '9'))
			return false;
	}	
	return true;
}

function IsFloat(str)	
{
	var i;
	for(i=0;i<str.length;i++)
	{
		if(str.charAt(i) == ' ' || 
			str.charAt(i) == ',' || 
			str.charAt(i) == '-' ||
			(!(str.charAt(i) >= '0' && str.charAt(i) <= '9') && str.charAt(i) != '.'))
			return false;
	}	
	return true;
}


//============================================================================================

function IsAlphaNumeric(str)
{
	var i;
	for(i=0;i<str.length;i++)
	{
		if(!(	((str.charAt(i) <= '9') && (str.charAt(i) >= '0')) ||
				((str.charAt(i) <= 'z') && (str.charAt(i) >= 'a')) ||
				(str.charAt(i) == ' ') || (str.charAt(i) == '-') ||
				(str.charAt(i) == 'ü') || (str.charAt(i) == 'ä') ||
				(str.charAt(i) == 'ö') || (str.charAt(i) == 'Ü') ||
				(str.charAt(i) == 'Ä') || (str.charAt(i) == 'Ö') ||
				(str.charAt(i) == 'é') || (str.charAt(i) == 'ß') ||
				((str.charAt(i) <= 'Z') && (str.charAt(i) >= 'A')) ))
			return(false);
	}
	return(true);
}

//============================================================================================

function IsAlpha(str)
{
	var i;
		
	for(i=0;i<str.length;i++)
	{
		if(!(	((str.charAt(i) <= 'z') && (str.charAt(i) >= 'a')) ||
				(str.charAt(i) == ' ') || (str.charAt(i) == '-') ||
				(str.charAt(i) == 'ü') || (str.charAt(i) == 'ä') ||
				(str.charAt(i) == 'ö') || (str.charAt(i) == 'Ü') ||
				(str.charAt(i) == 'Ä') || (str.charAt(i) == 'Ö') ||
				(str.charAt(i) == 'é') || (str.charAt(i) == 'ß') ||
				((str.charAt(i) <= 'Z') && (str.charAt(i) >= 'A')) ))
			return(false);
	}
	return(true);
}

//============================================================================================

function Trim(str)
{
	//trim leding spaces
	while(true)
	{
		if(str.charAt(0) == ' ')
			str = str.substr(1);
		else
			break;
	}
		
	//trim trailing spaces
	while(true)
	{
		if(str.charAt(str.length-1) == ' ')
			str = str.substr(0,str.length-1);
		else
			break;
	}
	return(str);	
}

//============================================================================================

function IsDate(argDate)
{
	var date_split;
	var i;
	var tdate, tmonth, tyear;
		
	date_split = argDate.split('/');
		
	//check for date parts
	if(date_split.length != 3)
		return(false);
			
	//check for zero values
	for(i=0;i<date_split.length;i++)
	{
		if(parseInt(date_split[i]) == 0)
			return(false);
	}
		
	//check for 4-digit year
	if(date_split[2].length != 4)
		return(false);
			
	//check for valid date, e.g. 02/29/1997
	tdate = parseInt(date_split[1]);
	tmonth = parseInt(date_split[0]);
	tyear = parseInt(date_split[2]);
		
	var date = new Date(parseInt(date_split[2]),parseInt(date_split[0])-1,parseInt(date_split[1]));
		
	if(date.getDate() != tdate)
		return(false);
		
	if(date.getMonth() != (tmonth-1))
		return(false);
		
	if(date.getFullYear() != tyear)
		return(false);
			
	return(true);
}


function GetDate(argDate)
{
	//use IsDate() first !!!!
		
	var date_split;	
	var tdate, tmonth, tyear;
		
	date_split = argDate.split('/');
		
			
		
	tdate = parseInt(date_split[1]);
	tmonth = parseInt(date_split[0]);
	tyear = parseInt(date_split[2]);
		
	return date = new Date(parseInt(date_split[2]),parseInt(date_split[0])-1,parseInt(date_split[1]));
			
}

function IsEmail(valor)
{
  if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(valor))
  {    
    return true;
  }
  else
  {
		return false;
  }
}