if (document.images) {
	var imCh1=new Array();
		imCh1[0]=new Image(),imCh1[0].src="png/guestbook.png";
		imCh1[1]=new Image(),imCh1[1].src="png/guestbook2.png";
	var imCh2=new Array();
		imCh2[0]=new Image(),imCh2[0].src="png/bbs.png";
		imCh2[1]=new Image(),imCh2[1].src="png/bbs2.png";
	var imCh3=new Array();
		imCh3[0]=new Image(),imCh3[0].src="png/links.png";
		imCh3[1]=new Image(),imCh3[1].src="png/links2.png";
	var imCh4=new Array();
		imCh4[0]=new Image(),imCh4[0].src="png/freesoft.png";
		imCh4[1]=new Image(),imCh4[1].src="png/freesoft2.png";
	var imCh5=new Array();
		imCh5[0]=new Image(),imCh5[0].src="png/main.png";
		imCh5[1]=new Image(),imCh5[1].src="png/main2.png";
}
function imCha1(name,num) {
	if (document.images) document.images[name].src=imCh1[num].src;
}
function imCha2(name,num) {
	if (document.images) document.images[name].src=imCh2[num].src;
}
function imCha3(name,num) {
	if (document.images) document.images[name].src=imCh3[num].src;
}
function imCha4(name,num) {
	if (document.images) document.images[name].src=imCh4[num].src;
}
function imCha5(name,num) {
	if (document.images) document.images[name].src=imCh5[num].src;
}