function mouseOver(bname)
{
if (bname=="b1") 
{document.b1.src ="button11.gif"}
if (bname=="b2")
{document.b2.src ="button22.gif"}
if (bname=="b3")
{document.b3.src ="button33.gif"}
if (bname=="b4")
{document.b4.src ="button44.gif"}
if(bname=="b5")
{document.b5.src ="button55.gif"}
}
function mouseOut(bname)
{
if (bname=="b1") 
{document.b1.src ="button1.gif"}
if (bname=="b2")
{document.b2.src ="button2.gif"}
if (bname=="b3")
{document.b3.src ="button3.gif"}
if (bname=="b4")
{document.b4.src ="button4.gif"}
if(bname=="b5")
{document.b5.src ="button5.gif"}
}
function mouseDown(bname)
{
if (bname=="b1")
{document.b1.src ="button111.gif"}
if (bname=="b2")
{document.b2.src ="button222.gif"}
if (bname=="b3")
{document.b3.src ="button333.gif"}
if (bname=="b4")
{document.b4.src ="button444.gif"}
if(bname=="b5")
{document.b5.src ="button555.gif"}
}