/* Checks that given string is valid as email address */
	
	function checkEmail(email)
	{
	 /* var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	  if (filter.test(email)) return true;
	  else return false;*/
	  var regEmail = /^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/;
	  if(email.toUpperCase().match(regEmail))
	  {
			bVal = true;
	  }
	  else
	  {
			bVal = false;
		
	  }
	  return bVal;
	}
	 
	var origBorder = "1px solid #7F9DB9";
	var strErrorBorder = "1px solid red";
	 
	/* Validate user input */
	function validateUserInput( sLang ) {
		 
		   var elemName= document.getElementById("txtname");
		   var elemEmail = document.getElementById("txtemail");
		   var elemTelephone= document.getElementById("txttelephone");
			
		   var boolError = false;
		   var strError = "";
		   
		   var vEmail = elemEmail.value;
		   var vTelephone = elemTelephone.value;
		   var vName = elemName.value;
	 
		   elemName.style.border = origBorder;
		   elemEmail.style.border = origBorder;
		   elemTelephone.style.border = origBorder;
		   
		   // Trim white-space
		   vName = Trim(vName);
		   vEmail = Trim(vEmail);
		   vTelephone = Trim(vTelephone);
		   
		   // Run validation
		  if(sLang == "en"){
		if(elemName.value.length == 0) {
			strError += "Please fill in your name\n";		
			elemName.style.border = strErrorBorder;
			boolError = true;
		}
	
		if(elemEmail.value.length == 0 || !checkEmail(elemEmail.value)) {
			strError += "Please fill in a VALID email address\n";		
			elemEmail.style.border = strErrorBorder;
			boolError = true;
		}
		
		if(elemEmail.value.length == 0 && elemTelephone.value.length == 0) {
			strError += "Please fill in email or telephone number\n";		
			elemEmail.style.border = strErrorBorder;
			elemTelephone.style.border = strErrorBorder;
			boolError = true;
		}
		
		if( boolError ) alert ( strError );
		return ! boolError;
	} else if (sLang =="es") {
			if(elemName.value.length == 0) {
			strError += "Introduzca su nombre\n";		
			elemName.style.border = strErrorBorder;
			boolError = true;
			}
		
			if(elemEmail.value.length == 0 || !checkEmail(elemEmail.value)) {
				strError += "Introduzca un correo electronico valido\n";		
				elemEmail.style.border = strErrorBorder;
				boolError = true;
			}
			
			if(elemEmail.value.length == 0 && elemTelephone.value.length == 0) {
				strError += "Introduzca su telefono o correo electronico\n";		
				elemEmail.style.border = strErrorBorder;
				elemTelephone.style.border = strErrorBorder;
				boolError = true;
			}
			
			if( boolError ) alert ( strError );
			return ! boolError;	
	} else {
			if(elemName.value.length == 0) {
			strError += "Deinen Namen bitte ausfüllen\n";		
			elemName.style.border = strErrorBorder;
			boolError = true;
			}
		
			if(elemEmail.value.length == 0 || !checkEmail(elemEmail.value)) {
				strError += "Gültige E-mail Adresse bitte ausfüllen\n";		
				elemEmail.style.border = strErrorBorder;
				boolError = true;
			}
			
			if(elemEmail.value.length == 0 && elemTelephone.value.length == 0) {
				strError += "E-mail Adresse oder Telefonnummer bitte ausfüllen\n";		
				elemEmail.style.border = strErrorBorder;
				elemTelephone.style.border = strErrorBorder;
				boolError = true;
			}
			
			if( boolError ) alert ( strError );
			return ! boolError;	
	}
}
	 
	/* Trim functions */
	function Trim(TRIM_VALUE)
	{
		if(TRIM_VALUE.length < 1){
			return "";
		}
		TRIM_VALUE = RTrim(TRIM_VALUE);
		TRIM_VALUE = LTrim(TRIM_VALUE);
		if(TRIM_VALUE==""){
			return "";
		}
		else
		{
			return TRIM_VALUE;
		}
	}
	function RTrim(VALUE)
	{
		var w_space = String.fromCharCode(32);
		var v_length = VALUE.length;
		var strTemp = "";
		
		if(v_length < 0){
			return "";
		}
		var iTemp = v_length -1;
	 
		while(iTemp > -1){
			if(!(VALUE.charAt(iTemp) == w_space))
			{
				strTemp = VALUE.substring(0,iTemp +1);
				break;
			}
			iTemp = iTemp-1;
		}
		return strTemp;
	}
	 
	function LTrim(VALUE)
	{
		var w_space = String.fromCharCode(32);
		
		if(v_length < 1){
			return"";
		}
		var v_length = VALUE.length;
		var strTemp = "";
	 
		var iTemp = 0;
	 
		while(iTemp < v_length){
			if(VALUE.charAt(iTemp) == w_space){
			}
			else{
				strTemp = VALUE.substring(iTemp,v_length);
				break;
			}
			iTemp = iTemp + 1;
		}
		return strTemp;
	}