function show_portfolio(popup_id){
	var popup2show = document.getElementById(popup_id)	
	popup2show.style.left = 'auto';
	popup2show.style.visibility = 'visible';
}

function close_portfolio(closing_img){	
	closing_img.parentNode.style.left = '-2000px';
	closing_img.parentNode.style.visibility = 'hidden';
}

function img_change(clicked_img, new_image_src){
	var p1 = clicked_img.parentNode;
	var p2 = p1.parentNode;
	clicked_img.className = 'popup_onclick_img_border';
	
	var p3 = p2.parentNode;
	
	if(navigator.appName == 'Microsoft Internet Explorer'){
		var c1 = p3.childNodes[0];
		
		for(var i=0; i<p1.childNodes.length; i++){
			if(p1.childNodes[i].className == 'popup_onclick_img_border' ){
				p1.childNodes[i].className = 'popup_onclick_img_no_border';				
			}			
		}
	}
	else{
		var c1 = p3.childNodes[1];
		for(var i=1; i<p1.childNodes.length; i++){
			if(p1.childNodes[i].className == 'popup_onclick_img_border' ){
				p1.childNodes[i].className = 'popup_onclick_img_no_border';				
			}			
		}
	}
	
	clicked_img.className = 'popup_onclick_img_border';
	var c2 = c1.firstChild;	
	c2.src = new_image_src;
}