var ids=new Array('a1','a2');

function switchid(id){	
	hideallids();
	showdiv(id);
}

function hideallids(){
	//loop through the array and hide each element by id
	for (var i=0;i<ids.length;i++){
		hidediv(ids[i]);
	}		  
}

function hidediv(id) {
	//safe function to hide an element with a specified id
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'none';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'none';
		}
		else { // IE 4
			document.all.id.style.display = 'none';
		}
	}
}

function showdiv(id) {
	//safe function to show an element with a specified id
		  
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'block';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'block';
		}
		else { // IE 4
			document.all.id.style.display = 'block';
		}
	}
}
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) { //v4.01
  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 MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}


/* EFECTO PARA AGRANDAR IMAGENES */
function gettrailobj(){
	if (document.getElementById) 
		return document.getElementById("trailimageid").style;
	else if (document.all) 
		return document.all.trailimagid.style;
}
function truebody(){
	return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body;
}
function hidetrail(){
	document.onmousemove="";
	document.getElementById('ttimg').src='img/s.gif';
	gettrailobj().visibility="hidden";
	gettrailobj().left=-1000;
	gettrailobj().top=0;
}
function showtrail(width,height,file){
	if(navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1){
		w=width;
		h=height;
		// followmouse();
		gettrailobj().visibility="visible";
		gettrailobj().width=w+"px";
		gettrailobj().height=h+"px";
		document.getElementById('ttimg').src=file;
		document.onmousemove=followmouse;
	}
}
function followmouse(e){
	if(navigator.userAgent.toLowerCase().indexOf('opera') == -1 && navigator.userAgent.toLowerCase().indexOf('safari') == -1){
		var xcoord=20;
		var ycoord=20;
		if (typeof e != "undefined"){
			xcoord+=e.pageX;
			ycoord+=e.pageY;
		}else if (typeof window.event !="undefined"){
			xcoord+=truebody().scrollLeft+event.clientX;
			ycoord+=truebody().scrollTop+event.clientY;
		}
		var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15;
		var docheight=document.all? Math.max(truebody().scrollHeight, truebody().clientHeight) : Math.max(document.body.offsetHeight, window.innerHeight);
		if (xcoord+w+3>docwidth)
			xcoord=xcoord-w-(20*2);
		if (ycoord-truebody().scrollTop+h>truebody().clientHeight)
			ycoord=ycoord-h-20;
		gettrailobj().left=xcoord+"px";
		gettrailobj().top=ycoord+"px";
	}
}
/* FIN EFECTO PARA AGRANDAR IMAGENES */