var ns4=(document.layers)?true:false;
var ie4=(document.all)?true:false;
var ie = (document.all)?true:false;
var dom=(!document.all && document.getElementById) ? true : false;
var v_plat=detect_os();

function detect_os(){
	var v_sis="";
	if (navigator.platform.toUpperCase().indexOf("WIN")==-1){
		v_sis="mac";
	}else{
		v_sis="win";
	}
	return v_sis;					
}

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_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_findObj(n, d) { //v4.0
  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 && document.getElementById) x=document.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 trim(camp){
	aux="";
	for (j=0;j<=camp.length;j++){
		if (camp.substr(j,1)!=" "){
			aux=aux+camp.substr(j,1);
		}
	}
	return aux;
}

function val_fecha(v_dat){
	
	var patro = /(0[1-9]|[12][0-9]|3[01])[-/.](0[1-9]|1[012])[-/.](19|20)\d\d/;
	
	return patro.test(v_dat);
	
}


//obri popup
function obrir_popup(url,f_amp,f_alt,nom_finestra){
	ancho=screen.width;				//ample pantalla
	alto=screen.height;				//alt pantalla
	v_top=(alto-f_alt)/2;
	v_left=(ancho-f_amp)/2;
	if (typeof(v_fin)=="object"){
		if (!v_fin.closed){
			v_fin.close();
		}
	}
	v_fin=window.open(url,nom_finestra,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width="+f_amp+",height="+f_alt+",top="+v_top+",left="+v_left);
}

function test_mail(camp){
	camp.toLowerCase();
	sw_pas=true;
	if (camp==""){
		sw_pas=false;
	}else{
		if ((camp.indexOf("@")==-1) || (camp.indexOf(" ")!=-1) || (camp.indexOf(".")==-1)){
			sw_pas=false;
		}else{
			if (camp.length<6){
				sw_pas=false;
			}
		}
	}
	return sw_pas;
}

function getOffsetLeft (el) {
	  var ol = el.offsetLeft;
	  while ((el = el.offsetParent) != null)
	    ol += el.offsetLeft;
	  return ol;
	}
	
function getOffsetTop (el) {
  var ot = el.offsetTop;
  while((el = el.offsetParent) != null)
	   ot += el.offsetTop;
  return ot;
}

function coor(ele,prop){
	aux=0;
	var dom=(!document.all && document.getElementById) ? true : false;
	//ie
	if (document.all) {
		t=eval("document.images['"+ele+"']");
		if (prop=="x"){
			aux=getOffsetLeft(t);
		}
		if (prop=="y"){
			aux=getOffsetTop(t);
		}
	}
	//ns4 i ns6
	if ((document.layers) || (dom) ) {
		var t=document.images[ele];
		if (prop=="x"){
			aux=t.x;
		}
		if (prop=="y"){
			aux=t.y;
		}
	}
	return aux;
}

function nova_capa(nom){
	var aux="";
	if(ns4){
		aux=eval("document."+nom);
	}else{
		if (ie4){
			aux=eval("document.all."+nom+".style");
		}else{
			//ns6
			aux=document.getElementById(nom).style;
		}
	}
	return aux;
}
		
function mostra(nom,mostra){
	capa=nova_capa(nom);
	if (capa!=""){
		if (mostra==1){
			posiciona_layers();
			capa.visibility="visible";
		}else{
			capa.visibility="hidden";
		}
	}
}