var http = createRequestObject();

function createRequestObject() {
	
	var objAjax;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
		objAjax = new ActiveXObject("Microsoft.XMLHTTP");
	}else{
		objAjax = new XMLHttpRequest();
	}
	return objAjax;
	
}

function emailTip(){
	
	document.getElementById('btnShowTipForm').style.display = 'none';
	document.getElementById('btnSendTip').style.display = 'none';
	document.getElementById('btnSendTipWait').style.display = 'block';
	
	var recipient = document.frmEmailTip.friendEmail.value;
	var recipientName = document.frmEmailTip.friendName.value;
	var sender = document.frmEmailTip.yourName.value;
	var tip = document.frmEmailTip.tip.value;
	
	var msg = escape('Hi ' + recipientName + ',<br><br>Your friend ' + sender + ' wanted to share this clever green idea from www.mygreensanta.com:<br><br>' + tip + '<br><br>If you want to read more earth-friendly thoughts or have some of your own to share, visit us at www.mygreensanta.com/green_ideas.php.<br><br>Thanks for making the planet a greener place!<br><br>Green Santa');
		
	var queryString = 'msg=' + msg + '&to=' + recipient;
	
	http.open('POST','email_tip.php',true);
	
	http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http.setRequestHeader("Content-length", queryString.length);
	http.setRequestHeader("Connection", "close");
	
	http.onreadystatechange = getReturnValue;
	http.send(queryString);

}

function getReturnValue(){

	if(http.readyState == 4){

		hideEmailTipTable();
		document.getElementById('btnSendTipWait').style.display = 'none';
		document.getElementById('btnShowTipForm').style.display = 'block';
		
		if(http.responseText.indexOf('success')>-1){

			document.getElementById('msgTipSentSuccess').style.display = "block";
			
		}else{
			
			document.getElementById('msgTipSentError').style.display = "block";
			
		}
		
		document.getElementById('contentMain').style.backgroundImage = 'url(assets/images/greenIdeas_contentBG.jpg)';
		
	}
	
}

function hideEmailTipTable(){
	
	document.getElementById('emailTipTable').style.display = "none";
	
}

function showEmailTipTable(){
	
	document.getElementById('emailTipTable').style.display = "block";
	document.getElementById('btnShowTipForm').style.display = 'none';
	document.getElementById('btnSendTip').style.display = 'block';
	document.getElementById('contentMain').style.backgroundImage = 'url(assets/images/greenIdeas_contentBG2.jpg)';
	document.getElementById('msgTipSentError').style.display = "none";
	document.getElementById('msgTipSentSuccess').style.display = "none";
	
}