imagen1=new Image
imagen1.src="images/link1.jpg"
imagen2=new Image
imagen2.src="images/link1b.jpg"
imagen3=new Image
imagen3.src="images/link2.jpg"
imagen4=new Image
imagen4.src="images/link2b.jpg"
imagen5=new Image
imagen5.src="images/link3.jpg"
imagen6=new Image
imagen6.src="images/link3b.jpg"
imagen7=new Image
imagen7.src="images/link4.jpg"
imagen8=new Image
imagen8.src="images/link4b.jpg"
imagen9=new Image
imagen9.src="images/link5.jpg"
imagen10=new Image
imagen10.src="images/link5b.jpg"
function cambiar() {                       
	document.images['link1'].src=imagen2.src
}
function cambiar2(){
	document.images['link1'].src=imagen1.src;
}
function cambiar3() {                       
	document.images['link2'].src=imagen4.src
}
function cambiar4(){
	document.images['link2'].src=imagen3.src;
}
function cambiar5() {                       
	document.images['link3'].src=imagen6.src;
}
function cambiar6(){
	document.images['link3'].src=imagen5.src;
}
function cambiar7() {                       
	document.images['link4'].src=imagen8.src
}
function cambiar8(){
	document.images['link4'].src=imagen7.src;
}
function cambiar9() {                       
	document.images['link5'].src=imagen10.src
}
function cambiar10(){
	document.images['link5'].src=imagen9.src;
}