var defaultSearch = 'search articles';
function checkSearch() {
	if (document.getElementById('s').value.length == 0) {
		document.getElementById('s').value = defaultSearch;
	}
	if (document.getElementById('s').value == defaultSearch) {
		document.getElementById('s').onclick = function() { document.getElementById('s').value = ''; document.getElementById('s').style.color = ''; };
		document.getElementById('s').style.color = '#999999';
	} else {
		document.getElementById('s').onclick = null;
	}
}