function cmpplvchvrvd(prmcrvd){
	plvrrvd = document.getElementById("plvrrvd");
	if(prmcrvd && plvrrvd.value==""){
		plvrrvd.value="Palavra-chave";
	} else if(plvrrvd.value=="Palavra-chave"){
		plvrrvd.value="";
	}
}
function slctaplcrvd(vlrajxrvd){
	try {
        ajax = new ActiveXObject("Microsoft.XMLHTTP");
    } 
    catch(e) {
		try {
            ajax = new ActiveXObject("Msxml2.XMLHTTP");
        }
	    catch(ex) {
			try {
				ajax = new XMLHttpRequest();
            }
	        catch(exc) {
				alert("Esse browser não tem recursos para uso do Ajax");
				ajax = null;
            }
        }
    }
	if(ajax) {
		prdtrvd = document.getElementById("prdtrvd");
		prdtrvd.options.length = 1;
		ajax.open("POST", "engines/aplicacoes.php");
		ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		
		ajax.onreadystatechange = function() {
            if(ajax.readyState == 4 && ajax.responseXML) {
			    processXML(ajax.responseXML);
            }
         }
	     var prmsajxrvd = "aplcrvd="+vlrajxrvd;
         ajax.send(prmsajxrvd);
      }
}
function processXML(objajxrvd){
    var dtarrrvd   = objajxrvd.getElementsByTagName("produto");
	  if(dtarrrvd.length > 0) {
         for(var i = 0 ; i < dtarrrvd.length ; i++) {
            var item = dtarrrvd[i];
			var vlrdtarvd = item.getElementsByTagName("valor")[0].firstChild.nodeValue;
			var nomdtarvd = item.getElementsByTagName("nome")[0].firstChild.nodeValue;
			var nvoptrvdajx = document.createElement("option");
			nvoptrvdajx.value = vlrdtarvd;
			nvoptrvdajx.text  = nomdtarvd;
			prdtrvd.options.add(nvoptrvdajx);
		 }
	  }
}