function changeImg(img){
	var css = img.children[0].className;
	if(css.indexOf("_over") > 0){
		img.children[0].className = "mgt_bg "+img.id;
	}else if(css.indexOf("_active") <= 0){
		img.children[0].className = "mgt_bg "+img.id+"_over";
	}
}

function rollImg(img){
	if(img.src.indexOf("_over") > 0){
		img.src = img.src.replace("_over.gif", ".gif");
	}else{
		img.src = img.src.replace(".gif", "_over.gif");
	}
}

function closeCover(){
	var cov = document.getElementById('cover');	
	cov.style.display = 'none';
	
	var learn = document.getElementById('learn_more');	
	if(learn != undefined){
		learn.style.display = 'none';
	}
	
	document.body.style.overflow = 'auto';
} 

function learnMore(){
	var cov = document.getElementById('cover');	
	cov.style.display = '';
	
	var learn = document.getElementById('learn_more');	
	if(learn != undefined){
		learn.style.display = '';
	}
	
	document.body.style.overflow = 'hidden';
}

function validateForm(){
	var obj = document.contactfrm;
	if(obj.cname.value == '' || obj.cemail.value == '' || obj.cmessage.value == ''){
		alert('Your Name, Email and Comments are required to submit a message!');
		return false;
	}	
	return true;
}