function printPreview() {
	setActiveStyleSheet( "Print Preview" );
	document.getElementById( 'printMessage' ).className = "notice";
	document.getElementById( 'printMessage' ).innerHTML = "<strong>Vers&atilde;o para impress&atilde;o</strong> - <a href=\"#\" onclick=\"printCancel();\" >Clique aqui</a> para voltar ao modo normal de visualiza&ccedil;&atilde;o.";
}

function printCancel() {
	setActiveStyleSheet( "default" );
	document.getElementById( 'printMessage' ).className = "";
	document.getElementById( 'printMessage' ).innerHTML = "";
}

function setActiveStyleSheet( title ) {
	var i, a, main;
	for( i = 0; ( a = document.getElementsByTagName( "link" )[ i ] ); i++ ) {
		if( a.getAttribute( "rel" ).indexOf( "style" ) != -1 && a.getAttribute( "title" ) ) {
			a.disabled = true;
			if( a.getAttribute( "title" ) == title ) { a.disabled = false };
		}
	}
}