function CheckField(obj,realname)
{
	if (obj)
	{
		if (obj.value == '' || obj.value == ' ') 
		{
			return '- ' + realname + '\n';
		}
		else
		{
			return '';
		}
	}
}

function CheckSelect(obj,realname)
{
	if (obj)
	{
		if (obj.options[obj.selectedIndex].text == '' || obj.options[obj.selectedIndex].text == ' '  || obj.options[obj.selectedIndex].text == 'Click here to select...') 
		{
			return '- ' + realname + '\n';
		}
		else
		{
			return '';
		}
	}
}

function checkemail(str)
{

	/*

	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i

	if (filter.test(str))
	{
		return true
	}
	else
	{
		alert('The email address you have entered does not seem to be valid.');
		return false
	}
	*/

	if ((str.indexOf(".") > 2) && (str.indexOf("@") > 0))
	{
		return true
	}
	else
	{
		alert('The email address you have entered does not seem to be valid.');
		return false
	}

}

function IsDate(sText)
{
	var ValidChars = "0123456789";
	var result = false;
	var format = "nn/nn/nnnn"; // UK Style Date
	var FormatChar;
	var Char
	
	//alert('Length: ' + sText.length);
	
	if (sText.length == 10)
	{
		for (i = 0; i < format.length; i++)
		{
			FormatChar = format.charAt(i);
			Char = sText.charAt(i);
			//alert('FormatChar: ' + FormatChar);
			//alert('Char: ' + Char);
			if (FormatChar == 'n')
			{
				if (ValidChars.indexOf(Char) == -1)
				{
					//alert(Char + ' is not a number');
					return false;
				}
			}
			else
			{
				if (Char != FormatChar)
				{
					//alert(Char + ' and ' + FormatChar + ' are not equal to each other');
					return false;
				}
			}		
		}			
	}
	else
	{
		return false;
	}
	return true;
}


function IsNumeric(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;

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


function IsDouble(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;
   var Pos = sText.indexOf('.');
   
   //alert('Pos: ' + Pos);

 	if (Pos != -1)
	{
		for (i = sText.length-1; i< sText.length-2; i--) 
  		{ 
	      Char = sText.charAt(i); 
		  //alert('Loop 1, Char ' + i + ' : ' + Char);
    	  if (ValidChars.indexOf(Char) == -1) 
	      {
    	     IsNumber = false;
	      }
	    }
		
		for (i=0; i<Pos; i++)
		{
		  Char = sText.charAt(i); 
		  //alert('Loop 2, Char ' + i + ' : ' + Char);
    	  if (ValidChars.indexOf(Char) == -1) 
	      {
    	     IsNumber = false;
	      }
		}		
	}
	else
	{
		if (!IsNumeric(sText))
		{
			IsNumber = false;
		}
	}
   	return IsNumber;
}

function round(amount,X)
{
	// rounds number to X decimal places, defaults to 2

	X = (!X ? 2 : X);
	var g= Math.round(amount*Math.pow(10,X))/Math.pow(10,X);
	var s=g.toString()
	if (s.indexOf(".")==-1)
	{
		len=X
		g=g+"."
	}
	else
	{
		len=(X - (s.length - s.lastIndexOf("."))+1)
	}

	for(i=0;i<len;i++)
	{
		g=g+"0"
	}
	return g
}


function formatNumber(val,dp) 
{ 
	var no = eval(val);
	if (!no)
		no = 0.0;
	return round(no, dp);
} 

function setClass(classToSet,id) {
	var elem = document.getElementById(id);
	elem.className = classToSet;
}

//uses ValidForm.js
function validateOptions()
{
   var ok = true;
   if(document.getElementById("options"))
   {
      var vForm = new ValidForm("buy");
	  var fields = vForm.getFields();
	  var validatedFields = null;
      for(var i = 0; i < fields.length; i++)
	  {
	     if(fields[i].type == "select-one")
		 {
		    vForm.addFieldProhibitedString(fields[i].id, "Click here to select...");
		 }
	  }
      vForm.validate();
	  if(!vForm.isValid())
	  {
	     ok = false;
	     alert("You did not select values for all of the product options before adding it to your cart.\n\nPlease select values for the highlighted options");
	     
		 validatedFields = vForm.getFields();
	     for(var j = 0; j < validatedFields.length; j++)
	     {
		    if(validatedFields[j].valid == false)
            {
	           validatedFields[j].style.backgroundColor = "#ffffcc";
	        }
		    else
		    {
		       validatedFields[j].style.backgroundColor = "#ffffff";
		    }
	     }
      }
   }
   return ok;
}