function changeImage(){ 
var newHTMLa2500 ='<img src="http://images.shrinktheweb.com/xino.php?stwembed=1&stwxmax=200&stwymax=150&stwaccesskeyid=45414954b788ff1&stwurl=http://mountainmeadow.net" border=0 />';
	document.getElementById('a2500').innerHTML = newHTMLa2500;
}