var cargado = 0; 
var bot1on = null; 
var bot1off = null; 
var bot2on = null; 
var bot2off = null; 
var bot3on = null; 
var bot3off = null; 
var bot4on = null; 
var bot4off = null; 
var bot5on = null; 
var bot5off = null; 
var bot6on = null; 
var bot6off = null; 
var bot7on = null; 
var bot7off = null; 
var bot8on = null; 
var bot8off = null; 

function iniciar () {
bot1on = new Image(); bot1on.src ="web/images/comun/botoneraPrincipal/bot1a.gif"; 
bot1off = new Image(); bot1off.src ="web/images/comun/botoneraPrincipal/bot1.gif"; 
bot2on = new Image(); bot2on.src ="web/images/comun/botoneraPrincipal/bot2a.gif"; 
bot2off = new Image(); bot2off.src ="web/images/comun/botoneraPrincipal/bot2.gif"; 
bot3on = new Image(); bot3on.src ="web/images/comun/botoneraPrincipal/bot3a.gif"; 
bot3off = new Image(); bot3off.src ="web/images/comun/botoneraPrincipal/bot3.gif"; 
bot4on = new Image(); bot4on.src ="web/images/comun/botoneraPrincipal/bot4a.gif"; 
bot4off = new Image(); bot4off.src ="web/images/comun/botoneraPrincipal/bot4.gif"; 
bot5on = new Image(); bot5on.src ="web/images/comun/botoneraPrincipal/bot5a.gif"; 
bot5off = new Image(); bot5off.src ="web/images/comun/botoneraPrincipal/bot5.gif"; 
bot6on = new Image(); bot6on.src ="web/images/comun/botoneraPrincipal/bot6a.gif"; 
bot6off = new Image(); bot6off.src ="web/images/comun/botoneraPrincipal/bot6.gif"; 
bot7on = new Image(); bot7on.src ="web/images/comun/botoneraPrincipal/bot7a.gif"; 
bot7off = new Image(); bot7off.src ="web/images/comun/botoneraPrincipal/bot7.gif"; 
bot8on = new Image(); bot8on.src ="web/images/comun/botoneraPrincipal/bot8a.gif"; 
bot8off = new Image(); bot8off.src ="web/images/comun/botoneraPrincipal/bot8.gif"; 

cargado = 1;
 

} function rollon(imgName) { if (cargado != 0) { imgOn = eval(imgName + "on.src"); document[imgName].src = imgOn; } } function rolloff(imgName) { if (cargado != 0) { document[imgName].src = eval(imgName + "off.src"); } }