function common_checkEmail ( address )
	{
	return /^\w[\w.\-\&]*\@\w[\w.\-]*\w{2,}/.test(address); 
	//return re.test(address);
	}

function common_checkHref ( address )
	{
	var re =/^http\:\/\/[\w.\-]+\.\w{2,}\/?\??/;
	//return false;
	//return true;
	return re.test(address);
	}
	
function common_checkFile ( fileName, accessExtStr )
	{
	eval ("var re =/\.((" + accessExtStr + "))$/;");
	return re.test(fileName);
	}