// JavaScript Document

function validate(object,field,errorOutput,minLength,maxLength,optional)
{
	
		switch(object.type) // get object type
		{
		case "text": // text input
			var valid = true;
			var message = "";

			if(optional == 0) // text
			{
				if(isEmpty(object))
				{
					valid = false;
					message = "Your "+field+" must be at least " + minLength + " letters long. Please enter it again.";
				}
				
				if(!stringLength(object,minLength,maxLength))
				{
					valid = false;
					message = "Your "+field+" must be at least " + minLength + " letters long. Please enter it again.";
				}		
				
			}
			if(optional == 1) // number
			{
				if(!isNumeric(object))
				{
					valid = false;
					message = "Your "+field+" must be a number. Please enter it again.";

				}
				
			} 
			if(optional == 2) // username
			{		
				if(isEmpty(object))
				{
					valid = false;
					message = "Your "+field+" must be at least " + minLength + " letters long. Please enter it again.";
				}
				
				if(!stringLength(object,minLength,maxLength))
				{
					valid = false;
					message = "Your "+field+" must be at least " + minLength + " letters long. Please enter it again.";
				}	
				
				if(!stringCheckChars(object))
				{
					valid = false;
					message = "Your "+field+" contains illegal characters. Please remove the illegal characters.";
				}	
			}
			
			if(optional == 3) // email
			{	
				if(isEmpty(object))
				{
					valid = false;
					message = "Your "+field+" must be at least " + minLength + " letters long. Please enter it again.";
				}
				
				if(!stringLength(object,minLength,maxLength))
				{
					valid = false;
					message = "Your "+field+" must be at least " + minLength + " letters long. Please enter it again.";
				}
				
				if(!validateEmail(object))
				{
					valid = false;
					message = "Invalid "+field+". Please enter it again.";
				}			
				
				
			}	
			
			if(optional == 4) // verification
			{	
				if(isEmpty(object))
				{
					valid = false;
					message = "The "+field+" code must be " + minLength + " letters long. Please enter it again.";
				}
				
				if(!stringLength(object,6,6))
				{
					valid = false;
					message = "The "+field+" code must be " + minLength + " letters long. Please enter it again.";
				}	
				
			}	
			
			if(optional == 5) // number
			{
				if(!isNumeric(object))
				{
					valid = false;
					message = "Your "+field+" must be a number. Please enter it again.";

				}
				
				if(isEmpty(object))
				{
					valid = true;
				}				
				
			} 	
			
			if(optional == 6) // number empty
			{
				if(!isNumeric(object))
				{
					valid = false;
					message = "The "+field+" must be a number. Please enter it again.";

				}
				
				if(isEmpty(object))
				{
					valid = false;
					message = "The "+field+" must be a number. Please enter it again.";
				}				
				
			} 			
					

			if(valid) // if ok
			{
				hide(errorOutput); // if invalid show error text
			}
			else
			{
				show(errorOutput); // if invalid show error text
				document.getElementById(errorOutput).innerHTML = message;	
			}

		  break   
		case "textarea": // textarea
		  	show(errorOutput); // if invalid show error text
			document.getElementById(errorOutput).innerHTML = "The name you entered was invalid " + object.type;			  
		  break 
		case "checkbox": // checkbox
		  	show(errorOutput); // if invalid show error text
			document.getElementById(errorOutput).innerHTML = "The name you entered was invalid " + object.type;		  
		  break 		  
		default:
		  return (true);
		}
	

}

function show(id){
	var obj = document.getElementById(id);	
	obj.style.display = "block";
}

function hide(id){
	var obj = document.getElementById(id);	
	obj.style.display = "none";
}


function stringLength(object,minLength,maxLength)
{
	var valid = true;
	
	if ((object.value.length < minLength) || (object.value.length > maxLength)) 
	{
		valid = false;
	}
	
	return valid;
}

function stringCheckChars(object)
{
	var valid = true;		
	var illegalChars = /\W/;
  // allow only letters, numbers, and underscores
    if (illegalChars.test(object.value)) 
	{
       valid = false;
    } 
	
	return valid;	
}

function isEmpty(elem) {
  var str = elem.value;
  var re = /.+/;
    if(str.match(re)) 
	{
        return false;
    } 
	else 
	{
        return true;
    }
}

function isNumeric(object)
{
	var valid = true;
	var numericExpression = /^[0-9]+$/;
	
	if(!object.value.match(numericExpression))
	{
		valid = false;
	}

	return valid;
}

function validateEmail(object)
{
	var valid = true;
	var str=object.value;
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (filter.test(str))
		valid = true;
	else
		valid = false;
		
	return valid;
}


function validateForm()
{

inputs = document.getElementsByTagName('input') // store collection of all

for (i = 0;i<inputs.length; i++)
{ // loop through and find <input

if ( inputs[i].type == 'text')
{
	if (inputs[i].onblur)
 		inputs[i].onblur();

}

}

	return false;
}

function deleteAccount(object)
{
	var answer = confirm("This will delete your account permanently. All items will be lost.")
	if (answer)
	{
		object.checked=true;
	}
	else
	{
		object.checked=false;
	}	
		
}

function lta(textarea, charlimit, textfield,message)
{ 
	var elem;

	if (textarea.value.length > charlimit)
	{
		textarea.value = textarea.value.substring(0, charlimit);
	}
	else 
	{
		document.getElementById(textfield).innerHTML = message + textarea.value.length + ' characters used';
	}
}