// show / hide an area
	function toggle ( target )
	{
	  if (document.getElementById)
	  {
			target = document.getElementById( target );
			
			if (target.style.display == "none")
			{
				target.style.display 	= "";
			}
			else
			{
				target.style.display 	= "none";
			}
		}
	}

	function checkEmail(email) {
		if (email.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi) == false) {
			alert("invalid email");
			return false;
		} else {
			return true;
		}
	}

	function yousure(msg)
	{
		if (!msg) {msg = "Are you sure?";}
		
		var where_to= confirm(msg);

		if (where_to == true) {
			return true;
		} else if (where_to == false) {
			return false;
		}
	}

	function insertAtCaret(obj, text) {
		if(document.selection) {
			obj.focus();
			var orig = obj.value.replace(/\r\n/g, "\n");
			var range = document.selection.createRange();

			if(range.parentElement() != obj) {
				return false;
			}

			range.text = text;
			
			var actual = tmp = obj.value.replace(/\r\n/g, "\n");

			for(var diff = 0; diff < orig.length; diff++) {
				if(orig.charAt(diff) != actual.charAt(diff)) break;
			}

			for(var index = 0, start = 0; 
				tmp.match(text) 
					&& (tmp = tmp.replace(text, "")) 
					&& index <= diff; 
				index = start + text.length
			) {
				start = actual.indexOf(text, index);
			}
		} else if(obj.selectionStart) {
			var start = obj.selectionStart;
			var end   = obj.selectionEnd;

			obj.value = obj.value.substr(0, start) 
				+ text 
				+ obj.value.substr(end, obj.value.length);
		}
		
		if(start != null) {
			setCaretTo(obj, start + text.length);
		} else {
			obj.value += text;
		}
	}
	
	function setCaretTo(obj, pos) {
		if(obj.createTextRange) {
			var range = obj.createTextRange();
			range.move('character', pos);
			range.select();
		} else if(obj.selectionStart) {
			obj.focus();
			obj.setSelectionRange(pos, pos);
		}
	}