var isIE=document.all?true:false;
var isDOM=document.getElementById?true:false;
var isNS4=document.layers?true:false;

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function ValidateTextBoxSpecialchar() {
	var key;
	if(!isNS4){
		key = String.fromCharCode(event.keyCode);
		if ((key== "<") || (key== ">") || (key== "'") || (key== "?") || (key== "*"))   event.returnValue = false;
	}else{
		key = String.fromCharCode(event.which);
		if ((key== "<") || (key== ">") || (key== "'") || (key== "?") || (key== "*"))   return false;
	}	
}

function ValidateTextBoxNumeric(e) {
	browser_type = navigator.appName;
	if(browser_type !="Netscape"){
		if (e.keyCode<45 || e.keyCode>57) event.returnValue = false;
	}else{
		if (e.which<45 || e.which>57) return false;	
	}
}
function Validate(frmid)
{
	var tpkeyword = document.getElementById(frmid+"_txtKeyword");
		
	if (tpkeyword.value == ""){
		alert("Para efectuar a sua pesquisa, terá que inserir uma palavra-chave.");
		tpkeyword.focus();
		return false;
	}
	
	return true;
}