var DEFAULT_SEARCH_VALUE = 'zoekwoorden';

function initSearch()
{
	var input = document.getElementById('search');
	input.onfocus = function()
	{
		if ( this.value == DEFAULT_SEARCH_VALUE )
		{
			this.value = '';
		}
	};
	input.onblur = function()
	{
		if ( this.value == '' )
		{
			this.value = DEFAULT_SEARCH_VALUE;
		}
	};
}

if ( window.attachEvent )
{
	window.attachEvent('onload', initSearch);
}
else if ( window.addEventListener )
{
	window.addEventListener('load', initSearch, false);
}