function  viewimages(){ 
  if(carname == "corvette"){
	  document.getElementById('changephoto').src= 'images/corvette_bottom_car.png';
	  document.getElementById('changephoto').style.width='445px';
	  document.getElementById('changephoto').style.height='171px';
  } else if(carname == "truck"){
 	  document.getElementById('changephoto').src= 'images/truk_bottom_car.png';
  	  document.getElementById('changephoto').style.width='473px';
	  document.getElementById('changephoto').style.height='247px';
  } else if(carname == "aboutcar"){
  	  document.getElementById('changephoto').src= 'images/about_car.png';
      document.getElementById('changephoto').style.width='405px';
	  document.getElementById('changephoto').style.height='250px';
  }
}
window.onload = viewimages;