function checkEnter(e){ //e is event object passed from function invocation
		if (!e) var e = window.event
		if (e.keyCode) code = e.keyCode;
		else if (e.which) code = e.which;

		// var code = evt.characterCode;
		// alert("code = " + code);
		if(code == 13){ //if generated character code is equal to ascii 13 (if enter key)
			// alert("submit the form.");
			
			if (document.getElementById("form_search").keyword.value.length < 3 && document.getElementById("form_search").keyword.value.length > 0) {
				alert("Minimum 3 characters please.");
				document.getElementById("form_search").keyword.focus();
				return false;
			} else {
				form_submit();
				return false;
			}
		} else {
			return code;
		}
		
	}