function formChange(){
	if(cngtng.artist.selectedIndex == 0 && cngtng.portfolio.selectedIndex == 0 && cngtng.period.selectedIndex == 0 && cngtng.atelier.selectedIndex == 0 && cngtng.cameraWork.selectedIndex == 0 && cngtng.keyword.value == ""){
		// display search all
		document.getElementById("go").style.display = "none";
		document.getElementById("searchAll").style.display = "inline";
	}else{
		// display go
		document.getElementById("go").style.display = "inline";
		document.getElementById("searchAll").style.display = "none";
	}
}