var remember = new Array();
	var remember2 = new Array();
	var rememberLink = new Array();
	var checkIt;
	var current=0;
	var curimg=0;
	var DHTML = (document.getElementById || document.all || document.layers);

function openphoto(){
   var altura_popup=_img2[curimg].height;
   var H = (screen.height - altura_popup) / 2;
   var anchura_popup=_img2[curimg].width;
   var L = (screen.width - anchura_popup) / 2;
	window.open(_img2[curimg].src,'popup','width='+ _img2[curimg].width+ ',height='+ _img2[curimg].height +',scrollbars=yes,resizable=yes,toolbar=no,directories=no,location=no,menubar=no,status=no,left='+L+',top='+H);
	return false;
}

	function roll_over(img_name, img_src)
	{
		document[img_name].src = img_src;
   	}
	function getObj(name)
	{
	  if (document.getElementById)
	  {
		return document.getElementById(name).style;
	  }
	  else if (document.all)
	  {
		return document.all[name].style;
	  }
	  else if (document.layers)
	  {
		return document.layers[name];
	  }
	  else return false;
	}
	
	function showNext(obj, total)
	{
		var top = parseFloat(current) + 1;
		var name = "tab" + top;
		var linknum = "link" + top;
		//alert(linknum);
		if(top <= total){
			show(name,1,obj,top,linknum);
		}
		return false;
	}
	
	function showLast(obj, total)
	{
		var top = parseFloat(current) - 1;
		var name = "tab" + top;
		var linknum = "link" + top;
		//alert(linknum);
		if(top >= 0){
			show(name,1,obj,top,linknum);
		}
		return false;
	}
	
	function show(name,lvl,obj,top,linknum)
	{
		if (!DHTML) return;
		
		if (remember[lvl] && remember[lvl] == name) return;
		
		if (remember[lvl])
		{
			closeAll(lvl);
		}
		if (name)
		{
			var x = getObj(name);
			x.visibility = 'visible';
			var y = getObj(linknum);
			y.fontWeight = 'bold';
		}
		current = top;
		remember[lvl] = name;
		rememberLink[lvl] = linknum;
		if (obj.parentNode) y = obj.parentNode;
		else if (obj.parentElement) y = obj.parentElement;
		else return;
		if (y.className) return;
		y.className = 'over';
		if (remember2[lvl]) remember2[lvl].className = '';
		remember2[lvl] = y;
	}
	
	function closeAll(lvl)
	{
		for (i=remember.length - 1;i>=lvl;i--)
		{
			if (remember[i])
			{
				var x = getObj(remember[i]);
				x.visibility = 'hidden';
				var y = getObj(rememberLink[i]);
				y.fontWeight = 'normal';
			}
			remember[i] = null;
			rememberLink[i] = null;
			if (remember2[i])
			{
				remember2[i].className = '';
				remember2[i] = null;
			}
		}
	}
	function vers(i){
		document.images['imgchange'].src=_img[i].src;
		curimg=i;
			return false;
	}
	
	function nextImg(){
		if(curimg < _img.length-1){
			curimg++;
			document.images['imgchange'].src=_img[curimg].src;
			//alert(curimg);
		}
			return false;
	}
	function prevImg(){
		t=curimg-1;
		if(t>=0){
			curimg=curimg-1;
			document.images['imgchange'].src=_img[curimg].src;
			//alert(curimg);
		}
			return false;
	}
	function openWA(){
	   var altura_popup=650;
   		var H = (screen.height - altura_popup) / 2;
  	 	var anchura_popup=800;
   		var L = (screen.width - anchura_popup) / 2;
		window.open("http://www.intrafermatta.com.mx/alumn.php",null, "height=650,width=800,status=yes,toolbar=no,menubar=no,location=no,left="+L+",top="+H);
	}