//choose another visual
function changeVisual(number, j)
	{
	
		var name = 'visual'+number;
		var wv = document.getElementById(name);
        wv.style.backgroundImage = 'url('+j+')';
        
        return false;
        
    }
	
	
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";
 }
}