function changeSrc2(clicked)
{
	button1 = document.getElementById('button1');
   button1.style.backgroundImage = "url(http://www.toquefino.info/ajax_component/images/proximos-eventos-l.jpg)";
   button1.style.width ="161";
   button1.style.height = "33";
   
   button2 = document.getElementById('button2');
   button2.style.backgroundImage = "url(http://www.toquefino.info/ajax_component/images/eventos-pasados-h.jpg)";
   button2.style.width ="144";
   button2.style.height = "33";
   //the above stmt assumes that the image is present 
   //in the same path as that of the html file
}

function changeSrc(clicked)
{
	
	button1 = document.getElementById('button1');
  button1.style.backgroundImage = "url(http://www.toquefino.info/ajax_component/images/proximos-eventos-h.jpg)";
   button1.style.width ="144";
   button1.style.height = "33";
   
   button2 = document.getElementById('button2');
   button2.style.backgroundImage = "url(http://www.toquefino.info/ajax_component/images/eventos-pasados-l.jpg)";
   button2.style.width ="161";
   button2.style.height = "33";
   //the above stmt assumes that the image is present 
   //in the same path as that of the html file
}