function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}

function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

/**
 * Função para validar busca
 */ 
Event.observe( window, 'load', function(){
	
	// onSubmit do Formulário de Busca
	if( $( 'formBusca' ) ){
		Event.observe( 'formBusca', 'submit', function(e){ validaBusca( e, 'formBusca' ) } );
	}
	// onSubmit do Formulário de Busca
	if( $( 'formBuscaComponent' ) ){
		Event.observe( 'formBuscaComponent', 'submit', function(e){ validaBusca( e, 'formBuscaComponent' ) } );
	}

});

function validaBusca( e, formulario )
{
	if( formulario == 'formBusca' ){
		var campo = 'mod_search_searchword';
	}
	else{
		var campo = 'searchword';
	}
	
	var inputValue = $( formulario ).elements[ campo ].value;

	if( inputValue == 'Pesquisar...' || inputValue == '' ){
		Event.stop(e);
		Aviso( 'Informe a Palavra-Chave para a busca' );
	}else if( inputValue.length < 3 ){
		Event.stop(e);
		Aviso( 'Digite no mínimo 3 caracteres' );
	}
}