//»¬¿éÇл»
function ChangeTD(ShowID,From,To,SpecialClass,CommonClass)
{
	var i;
	for(i=From;i<=To;i++)
	{
	  if(i!=ShowID)
	  {
	  	document.getElementById("ChangeTitle"+i).className=CommonClass;
		document.getElementById("ChangeContent"+i).style.display="none";
	  }
	  else
	  {
		document.getElementById("ChangeTitle"+i).className=SpecialClass;
		document.getElementById("ChangeContent"+i).style.display="";
	  }	
	}	
}

function right(mainStr,lngLen) {
// alert(mainStr.length)
	if (mainStr.length-lngLen>=0 && mainStr.length>=0 && mainStr.length-lngLen<=mainStr.length) {
	return mainStr.substring(mainStr.length-lngLen,mainStr.length)}
	else{return null}
}

function mid(mainStr,starnum,endnum){
	if (mainStr.length>=0){
	return mainStr.substr(starnum,endnum)
	}else{return null}
	//mainStr.length
}