xxx01=new Image(5,5)
xxx01.src="intro_img/butt_01.gif"
x01=new Image(5,5)
x01.src="intro_img/button_01.gif"

xxx02=new Image(5,5)
xxx02.src="intro_img/butt_02.gif"
x02=new Image(5,5)
x02.src="intro_img/button_02.gif"

xxx03=new Image(5,5)
xxx03.src="intro_img/butt_03.gif"
x03=new Image(5,5)
x03.src="intro_img/button_03.gif"

xxx04=new Image(5,5)
xxx04.src="intro_img/butt_04.gif"
x04=new Image(5,5)
x04.src="intro_img/button_04.gif"

xxx05=new Image(5,5)
xxx05.src="intro_img/butt_05.gif"
x05=new Image(5,5)
x05.src="intro_img/button_05.gif"

xxx07=new Image(5,5)
xxx07.src="intro_img/butt_07.gif"
x07=new Image(5,5)
x07.src="intro_img/button_07.gif"

xxx08=new Image(5,5)
xxx08.src="intro_img/butt_08.gif"
x08=new Image(5,5)
x08.src="intro_img/button_08.gif"

xxx09=new Image(5,5)
xxx09.src="intro_img/butt_09.gif"
x09=new Image(5,5)
x09.src="intro_img/button_09.gif"

function filter(imagename,objectsrc){
if (document.images)
document.images[imagename].src=eval(objectsrc+".src")
}