/* 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 origBorder = "1px solid #7F9DB9";
	var strErrorBorder = "1px solid red";
	 
	/* Validate user input */
	function validateUserInput() {
		   
		   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(vName.length < 3) {
				  strError += "Please fill in your name\n";              
				  elemName.style.border = strErrorBorder;
				  boolError = true;
		   }
	 
		   if(vEmail.length > 0 && !checkEmail(vEmail)) {
				  strError += "Please fill in a VALID email address\n";         
				  elemEmail.style.border = strErrorBorder;
				  boolError = true;
		   } 
		   
		   if(vEmail.length == 0 && vTelephone.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;
	}
	
	/* Validate user input */
	function validateUserInput2() {
		   
		   var elemName= document.getElementById("txtname");
	
		   var elemTelephone= document.getElementById("txttelephone");
			
		   var boolError = false;
		   var strError = "";
	
		   var vTelephone = elemTelephone.value;
		   var vName = elemName.value;
	 
	
		   elemTelephone.style.border = origBorder;
		   
		   // Trim white-space
		   vName = Trim(vName);
		   vTelephone = Trim(vTelephone);
		   
		   // Run validation
		   if(vName.length < 3) {
				  strError += "Please fill in your name\n";              
				  elemName.style.border = strErrorBorder;
				  boolError = true;
		   }
	 
		   
		   if(vTelephone.length == 0) {
				  strError += "Please fill in your telephone number\n";            
				  elemTelephone.style.border = strErrorBorder;
				  boolError = true;
		   }
		   
		   if( boolError ) alert ( strError );
		   return ! boolError;
	}
	 
	 
	/* Validate user input */
	function validateUserInput3() {
		   
		   var elemName= document.getElementById("txtname");
		   var elemEmail = document.getElementById("txtemail");
		   var elemTelephone= document.getElementById("txttelephone");
		   var elemTerms= document.getElementById("txtterms");
			
		   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(vName.length < 3) {
				  strError += "Please fill in your name\n";              
				  elemName.style.border = strErrorBorder;
				  boolError = true;
		   }
	 
		   if(vEmail.length > 0 && !checkEmail(vEmail)) {
				  strError += "Please fill in a VALID email address\n";         
				  elemEmail.style.border = strErrorBorder;
				  boolError = true;
		   } 
		   
		   if(vEmail.length == 0 && vTelephone.length == 0) {
				  strError += "Please fill in email or telephone number\n";            
				  elemEmail.style.border = strErrorBorder;
				  elemTelephone.style.border = strErrorBorder;
				  boolError = true;
		   }
		   
		   if(elemTerms.checked == false) {
				  strError += "Please agree to our terms and conditions\n";              
				  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;
	}