function limpabusca(searchBox,defaultValue){if (searchBox.value == defaultValue) {searchBox.value = '';}}
function limpauser(searchBox,defaultValue){if (searchBox.value == defaultValue) {searchBox.value = '';}}
function limpapass(searchBox,defaultValue){if (searchBox.value == defaultValue) {searchBox.value = '';}}
function showhide(id){if (document.getElementById){obj = document.getElementById(id); if (obj.style.display == "none"){obj.style.display = "";} else {obj.style.display = "none";}}}