// Valida que textObj contenga sólo letras de la A la Z
function isString(textObj) 
{
   var newValue = textObj.value;
   var newLength = newValue.length;
   var extraChars=".-&%!#=?¿¡,";
   var search;
   for(var i = 0; i != newLength; i++) 
   {
      aChar = newValue.substring(i,i+1);
      aChar = aChar.toUpperCase();
      search = extraChars.indexOf(aChar);
      if(aChar != " ")
      {
		if(search = -1 && (aChar < "A" || aChar > "Z")) 
		{
		   return false;
		}
	  }
   }
   return true;
}

// Valida que val contenga sólo dígitos del 0 al 9
function isNumeric(val) {
	var dp = false;
	for (var i=0; i<=val.length; i++) {
		if (!isDigit(val.charAt(i))) { 
			if (val.charAt(i) == '.') {
				if (dp == true) { 
				   return false;
				  } // already saw a decimal point
				else { dp = true; }
				}
			else {
				return false; 
				}
			}
		}
	return true;
	}
function isDigit(num) {
	var string="1234567890";
	if (string.indexOf(num) != -1) {
		return true;
		}
	return false;
	}	


function checkEmail(myForm) {
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myForm.txtEmail.value)){
return (true)
}
 return (false)
}

function textCounter(field, maxlimit) 
{
	if(field.value.length >= 1)
	{
		if (field.value.length > maxlimit) // if too long...trim it!
		field.value = field.value.substring(0, maxlimit);
	}
}