/* 
// Bild vergrößern (verdoppeln) -> ohne Rand
function enlarge(id, height, width) {
  var hoehe = height*2 + "px";
  var breite = width*2 + "px";
  window.document.getElementById(id).style.height = hoehe;  
  window.document.getElementById(id).style.width = breite;  
 }
function reduce(id, height, width) {
  var hoehe = height + "px";
  var breite = width + "px";
  window.document.getElementById(id).style.height = hoehe;  
  window.document.getElementById(id).style.width = breite;  
 }
*/

// Bild nach rechts unten verschieben -> links und oben Rand
function enlarge(id, height, width) {
  var borderTop = "2px";
  var borderLeft = "2px";
  var borderColor = "#000000";
  window.document.getElementById(id).style.borderTop = borderTop;  
  window.document.getElementById(id).style.borderLeft = borderLeft;  
  window.document.getElementById(id).style.borderTopColor = borderColor;  
  window.document.getElementById(id).style.borderLeftColor = borderColor;  
  window.document.getElementById(id).style.borderStyle = "solid";  
 }
function reduce(id, height, width) {
  var borderTop = "0px";
  var borderLeft = "0px";
  window.document.getElementById(id).style.borderTop = borderTop;  
  window.document.getElementById(id).style.borderLeft = borderLeft;  
 }