// JavaScript Document
function LTrim(value) {
	
	//alert(value);
	var re = /\s*((\S+\s*)*)/;
	return value.replace(re, "$1");
	
}

// Removes ending whitespaces
function RTrim( value ) {
	//alert(value);
	var re = /((\s*\S+)*)\s*/;
	return value.replace(re, "$1");
	
}

// Removes leading and ending whitespaces
function trim( value ) {
	
	return LTrim(RTrim(value));
	
}

function emailvalidation(str)
{
	var emailRegxp = /^[a-zA-Z]*[\w\.-]*[a-zA-Z0-9]@[a-zA-Z]*[\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/;
	//alert(emailRegxp.test(str));
	return emailRegxp.test(str);
}
function emailaddresshide(obj)
{
	if(obj.value=='Your email address') 
	{ 
		obj.value=''; 
	}
		
}

function emailaddressshow(obj)
{		
	if(obj.value!='Your email address' && trim(obj.value)=='') 
	{ 
		obj.value='Your email address'
	}
	
}

function signup()
{
	if(trim(document.form1.emailaddress.value)=="")
	{
		alert("Email Address is a required field!");
		document.form1.emailaddress.focus();
		return false;
	}	
	if(!emailvalidation(document.form1.emailaddress.value))
	{	
		alert("Invalid Email address!");
		document.form1.emailaddress.focus();
		return false;
	}	
	alert("Thank you for signing up to The Good Knife!");
	return true;
}