var filepath = 'pics/';

var conststr_rollover = '_Over';

var conststr_filename_MenuArrow = 'Button_Menuarrow';
var conststr_filename_ReadMore = 'Button_MoreInfo';
var conststr_filename_Download = 'Button_Download';
var conststr_filename_BuyNow = 'Button_Buy';

var conststr_buttonname_MenuArrow = 'btn_menuarrow';
var conststr_buttonname_ReadMore = 'btn_readmore';
var conststr_buttonname_Download = 'btn_download';
var conststr_buttonname_BuyNow = 'btn_buynow';
var fileext = '.jpg';

  

function btnclick(){
// alert("ok");
}


function RollOverIn( thebuttonname, thebuttonid ){
 
 var afilename = '';
   
   rollbutton = new Image();
    
      if (thebuttonname == conststr_buttonname_ReadMore) 
       {afilename = filepath + conststr_filename_ReadMore + conststr_rollover + fileext ;
       }
      else if (thebuttonname == conststr_buttonname_Download) 
       {afilename = filepath + conststr_filename_Download + conststr_rollover + fileext ;       }
      else if (thebuttonname == conststr_buttonname_BuyNow) 
       {afilename = filepath + conststr_filename_BuyNow + conststr_rollover + fileext ;       } 
      else if (thebuttonname == conststr_buttonname_MenuArrow) 
       {afilename = filepath + conststr_filename_MenuArrow + conststr_rollover + fileext;        }
      else {afilename = filepath + thebuttonname + conststr_rollover + fileext; }
       
      rollbutton.src = afilename;
     
      document.getElementById(thebuttonid).src = rollbutton.src;
      
      //alert(afilename);
 /*  */
}

function RollOverOut( thebuttonname, thebuttonid ){
 
var afilename = '';
  
      rollbutton = new Image();

    
      if (thebuttonname == conststr_buttonname_ReadMore) 
       {afilename = filepath + conststr_filename_ReadMore + fileext ;
       }
      else if (thebuttonname == conststr_buttonname_Download) 
       {afilename = filepath + conststr_filename_Download + fileext ;       }
      else if (thebuttonname == conststr_buttonname_BuyNow) 
       {afilename = filepath + conststr_filename_BuyNow + fileext ;       } 
      else if (thebuttonname == conststr_buttonname_MenuArrow) 
       {afilename = filepath + conststr_filename_MenuArrow + fileext ;       }
       else {afilename = filepath + thebuttonname + fileext;        }


       
      rollbutton.src = afilename;
      document.getElementById(thebuttonid).src = rollbutton.src;

    
/*   */
}