function add() {
		var tabela= document.getElementById("tbCaixas");
		i = tabela.rows.length;
		tabela.insertRow(i);
		tr = tabela.rows[i];
		tr.insertCell(0);
		tr.insertCell(0);
		//tr.insertCell(0);
		tr.cells[0].innerHTML = '<td valign="top"><input name="descricao[]" class="large" type="text" value=""></td>';
		tr.cells[1].innerHTML = '<td><input name="dimensao1[]" class="small" type="text" value="" maxlength="3" onKeyPress="return SomenteNumero(event)"> x <input name="dimensao2[]" type="text" maxlength="3" class="small" value="" onKeyPress="return SomenteNumero(event)"> x <input name="dimensao3[]" class="small" type="text" value="" maxlength="3" onKeyPress="return SomenteNumero(event)"></td>';
		//tr.cells[2].innerHTML = '<td><input name="seguro[]" class="small" type="text" value=""></td>';
		tr.cells[1].align = "left";
		tr.cells[0].width = "16%";	
}

function remove() {
	var tb = document.getElementById("tbCaixas");
	if (tb.rows.length > 1) {
		tb.deleteRow(tb.rows.length - 1);
	}
	
}