noterromsg = false;
msgerror = 'Digite alguma coisa para pesquisar.';
var default_msg = 'Pesquisa';

document.getElementById('search_input').value = default_msg;

document.getElementById('search_button').value = 'GO'; // texto do botão

if (window.attachEvent)
{ // IE
	document.getElementById('search_input').attachEvent('onfocus',onEnter);
	document.getElementById('search_input').attachEvent('onblur',onExit);

	document.getElementById('search_button').attachEvent('onfocus',buscaOK);
}
else
{ // W3C
	document.getElementById('search_input').addEventListener('focus',onEnter,false);
	document.getElementById('search_input').addEventListener('blur',onExit,false);

	document.getElementById('search_button').addEventListener('focus',buscaOK,false);
}

function onEnter()
{
	if (document.getElementById('search_input').value == default_msg)
	{
		document.getElementById('search_input').value = '';
	}
	else
	{
		document.getElementById('search_input').select();
	}
}

function onExit()
{
	if (document.getElementById('search_input').value == '')
	{
		document.getElementById('search_input').value = default_msg;
	}
}

function buscaOK()
{
	if (document.getElementById('search_input').value == default_msg)
	{ 
		document.getElementById('search_input').value = ''; 
		document.getElementById('search_input').focus();
	}
}