function valida() {
        if (emBranco(document.busca.buscasite.value)) { alert("Por favor, digite sua pesquisa."); document.busca.buscasite.focus(); return false;}
       }
    
    function isEmail(str) {
     return ((str != "") && (str.indexOf("@") != -1) && (str.indexOf(".") != -1));
    }
    
    function emBranco(str) {
        tamanho = str.length;
        contador = 0;
        for (x=0; x<tamanho; x++) {
            if (str.substring(x,x+1) == " ") { ++contador;}
        }
     return ((contador == tamanho) || (str == ""));
    }

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);


function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}


<!--

function mOvr(src,clrOver) {
if (!src.contains(event.fromElement)) {
 src.style.cursor = 'hand';
 src.bgColor = clrOver;
  }
}
function mOut(src,clrIn) {
if (!src.contains(event.toElement)) {
 src.style.cursor = 'default';
 src.bgColor = clrIn;
 }
}

  function MouseOver(src,corOver,corBorda,size,menu) {
    if (!src.contains(event.fromElement)) {
      src.style.border = "solid " + size + "px " + corBorda
	  src.style.cursor = 'hand';
	  src.bgColor = corOver;
      menu.style.visibility="visible"
	}
  }
  function MouseOut(src,corOut,corBorda,size,menu) {
	if (!src.contains(event.toElement)) {
      src.style.border = "solid 1px " + corOut
	  src.style.cursor = 'hand';
	  src.style.cursor = 'default';
	  src.bgColor = corOut;
      menu.style.visibility="hidden"
	}
  }
  function MouseClique(src) {
    if(event.srcElement.tagName=='TD'){

    }
  }
  
  
  function MouseOverSC(src,corOver,corBorda,size) {
    if (!src.contains(event.fromElement)) {
      src.style.border = "solid " + size + "px " + corBorda
	  src.style.cursor = 'hand';
	  src.bgColor = corOver;
	}
  }
  function MouseOutSC(src,corOut,corBorda,size) {
	if (!src.contains(event.toElement)) {
      src.style.border = "solid 1px " + corBorda
	  src.style.cursor = 'hand';
	  src.style.cursor = 'default';
	  src.bgColor = corOut;
	}
  }
    	function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}
-->