function open_popup(id){
	mywindow = window.open ("../emailarticle/emailarticle.php?id="+id, "mywindow","location=0,status=0,scrollbars=0,  width=400px,height=352px");
	mywindow.moveTo(100,50);
	return false;
}

function isEmail(e){
	var pattern=/^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+/;
    if(pattern.test(e)){         
		return true;   
    }else{   
		return false; 
    }
}

function isNotEmpty(v){
	trim_v = v.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
	if(trim_v.length == 0) return false;
	else return true;
}

function Validate(frm){
	var recipient_email = document.getElementById("_recipient_email").value;
	var recipient_name = document.getElementById("_recipient_name").value;
	var sender_email = document.getElementById("_sender_email").value;
	var sender_name = document.getElementById("_sender_name").value;
	var letters = document.getElementById("_captcha").value;
	
	if(!isEmail(recipient_email)){
		alert("Invalid recipient email");
		return false;
	}
	
	if(!isNotEmpty(recipient_name)){
		alert("Invalid recipient name");
		return false;
	}
	
	if(!isEmail(sender_email)){
		alert("Invalid sender email");
		return false;
	}
	
	if(!isNotEmpty(sender_name)){
		alert("Invalid sender name");
		return false;
	}
	
	if(!isNotEmpty(letters)){
		alert("Please write the characters from the box");
		return false;
	}
	
}