function check() {
	
	var f1=1;

	if (!document.auth.emlus.value.match(/^[\w-\.]+@([\w-]{2,}\.)+[A-Za-z]{2,4}$/i)) { document.auth.emlus.style.backgroundColor='#FFCCCC'; } else { document.auth.emlus.style.backgroundColor='#FFFFFF'; f1=0;}

	if(document.auth.pwdus.value.length < 3) {document.auth.pwdus.style.backgroundColor='#FFCCCC'; }else {document.auth.pwdus.style.backgroundColor='#FFFFFF'; f2=0;}

	if(f1==0 && f2==0){document.auth.sub.disabled=false;}else{document.auth.sub.disabled=true;}
}