function selectChange() {
		if(document.form1.select1.selectedIndex == 2) {
			document.form1.slecttext1.style.visibility="visible";
			return;
		} else if(document.form1.select1.selectedIndex == 4) {
			document.form1.slecttext1.style.visibility="visible";
			return;
		} else {
			document.form1.slecttext1.style.visibility="hidden";
			return;
		}
}