function showDiv(id)
{
	var i;
	for(i = 1; i < 8; i++)
	{
		document.getElementById("cos" + i).style.display = 'none';
		document.getElementById("imatge" + i).style.display = 'none';
	}
	
	document.getElementById("cos" + id).style.display = 'block';
	document.getElementById("imatge" + id).style.display = 'block';
	
}
function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i < anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}