function slHide(id){
	var dl=	document.getElementById(id);
	dl.style.display='none';
	dl.disabled='disabled';
}
function appear(id){
	var dl=	document.getElementById(id);
	dl.style.display='block';
	dl.disabled='';
}
function slHideAppear1(){
	var dl=	document.getElementById('ctVn');
	if(dl.value==1){
		slHide('slRegionInterVn');
		appear('slRegionsvn');
	}
	else{
		slHide('slRegionsvn');
		appear('slRegionInterVn');
	}
}
function slHideAppear2(){
	var dl=	document.getElementById('ctEng');
	if(dl.value==3){
		slHide('slRegionsInterEng');
		appear('slRegionsEng');
	}
	else{
		slHide('slRegionsEng');
		appear('slRegionsInterEng');
	}
}