function checkEmail(){	
		for (var k = 0; k < document.getElementById('email').value.length; k++){
			if (document.getElementById('email').value.charAt(k) == "@"){
				for(var d = k; d < document.getElementById('email').value.length; d++){
					if(document.getElementById('email').value.charAt(d) == "."){		
						return true;
					}
				}
			}      
		}
		alert("Please enter a valid email address");       
		return false;
	}