function mouse_in(n){
	s_tagname="tag"+n;
	img_url=document.getElementById(s_tagname).src;
	in_img_url=img_url.substring(0,img_url.length-5)+"2"+img_url.substring(img_url.length-4);
	document.getElementById("tag"+n).src=in_img_url;
}
function mouse_out(n){
	s_tagname="tag"+n;
	img_url=document.getElementById(s_tagname).src;
	in_img_url=img_url.substring(0,img_url.length-5)+"1"+img_url.substring(img_url.length-4);
	document.getElementById("tag"+n).src=in_img_url;
}