function over(buttonname){
eval('window.document.'+buttonname).src=(eval('window.document.'+buttonname).src).substr(0,(eval('window.document.'+buttonname).src).length-5)+'1.jpg';
}
function out(buttonname){
eval('window.document.'+buttonname).src=(eval('window.document.'+buttonname).src).substr(0,(eval('window.document.'+buttonname).src).length-5)+'0.jpg';
}