function VerGrilla()
		{
			try
			{
				var grilla = document.getElementById("grilla");
				if(grilla.style.display == 'none')
					showLayer("grilla");
				else
					hideLayer("grilla");		
			}
			catch (err)
			{
			}
		
		}


	function VerAreaCientifica()
		{
			try
			{
				var menuAreaCientifica  = document.getElementById("menuAreaCientifica");
				if(menuAreaCientifica.style.display == 'none')
					showLayer("menuAreaCientifica");
				else
					hideLayer("menuAreaCientifica");		
			}
			catch (err)
			{
			}
		
		}
		
		function showLayer(layerId)
		{
			try
			{
				var aLayer = document.getElementById(layerId);
				aLayer.style.display = 'block';
			}
			catch (err)
			{
			}
		
		}
		function hideLayer(layerId)
		{
			try
			{
				var aLayer  = document.getElementById(layerId);
				aLayer.style.display = "none";	
			}
			catch(err)
			{
			}
		}
		
		function showAreaCientifica()
		{
			try
			{
				var menuAreaCientifica  = document.getElementById("menuAreaCientifica");
				menuAreaCientifica.style.display = 'block';
				ubicar(miCarpetaContenedorObj, 0, 0);
			}
			catch (err)
			{
			}
		
		}
		
		function hideAreaCientifica()
		{
			try
			{
				var menuAreaCientifica  = document.getElementById("menuAreaCientifica");
				menuAreaCientifica.style.display = "none";	
			}
			catch(err)
			{
			}
		}

		function init() {
			if (!document.getElementById) return
			var imgOriginSrc;
			var imgTemp = new Array();
			var imgarr = document.getElementsByTagName('img');
			for (var i=0; i<imgarr.length; i++) {
				if (imgarr[i].getAttribute('hsrc')) {
					imgTemp[i] = new Image();
					imgTemp[i].src = imgarr[i].getAttribute('hsrc');
					imgarr[i].onmouseover = function() {
						imgOriginSrc = this.getAttribute('src');
						this.setAttribute('src',this.getAttribute('hsrc'))
					}
					imgarr[i].onmouseout = function() {
						this.setAttribute('src',imgOriginSrc)
					}
				}
			}
		}
		onload=init;