if (document.images) { 
// start pic 1
image1N= new Image(225,101); 
image1N.src= 'images/cinema-logo.gif' ; 
image1H= new Image(225,101); 
image1H.src= 'images/cinema-logo2.gif' ; 
// End pic 1

function myOn(myImgName) { 
document[myImgName].src=eval(myImgName+ 'H' ).src; 
} 

function myOut(myImgName) { 
document[myImgName].src=eval(myImgName+ 'N' ).src; 
} 
}