function f_over() {
	i_img.filters(0).opacity=0.7;
	i_img.filters(0).grayscale=1;
}
function f_out() {
	i_img.filters(0).opacity=1.0;
	i_img.filters(0).grayscale=0;
}
function f_over2() {
	i_img2.filters(0).opacity=0.7;
	i_img2.filters(0).grayscale=1;
}
function f_out2() {
	i_img2.filters(0).opacity=1.0;
	i_img2.filters(0).grayscale=0;
}
function f_over3() {
	i_img3.filters(0).opacity=0.7;
	i_img3.filters(0).grayscale=1;
}
function f_out3() {
	i_img3.filters(0).opacity=1.0;
	i_img3.filters(0).grayscale=0;
}
function f_over4() {
	i_img4.filters(0).opacity=0.7;
	i_img4.filters(0).grayscale=1;
}
function f_out4() {
	i_img4.filters(0).opacity=1.0;
	i_img4.filters(0).grayscale=0;
}
function f_load() {
	i_img.style.filter=
"progid:DXImageTransform.Microsoft.BasicImage(opacity=1.0, grayscale=0)";
	i_img2.style.filter=
"progid:DXImageTransform.Microsoft.BasicImage(opacity=1.0, grayscale=0)";
	i_img3.style.filter=
"progid:DXImageTransform.Microsoft.BasicImage(opacity=1.0, grayscale=0)";
	i_img4.style.filter=
"progid:DXImageTransform.Microsoft.BasicImage(opacity=1.0, grayscale=0)";
}