function swap_imgage(name, imgsrc){
	document.images[name].src = '../img/' + imgsrc; 
	}
	
	
	function openWindow(theURL,winName,width,height) {
			var scrollbars;
			var top, left;
	
		  if (width>=screen.availWidth) {
				width = screen.availWidth - 50;
	  		left = 10;
	  		scrollbars = ', scrollbars=yes';
			}
			else {
				left = screen.availWidth/2 - width/2;
			}
		  if (height>=screen.availHeight) {
	  		height = screen.availHeight - 50;
	  		top = 10;
	  		scrollbars = ', scrollbars=yes';
			}
			else {
				top = screen.availHeight/2 - height/2;
			}
		  window.open(theURL, winName, 'resize=no, menubar=no, left=' + left + ', top=' + top + scrollbars + ', width=' + width + ', height=' + height);
	}