function ChanSel(wObj,mNum,sNum,nTotl,cClname) {
	ID='ct'+mNum+'_'+sNum;
	oParent=wObj.parentNode;
	for (i=0;i<nTotl;i++) {
		oParent.getElementsByTagName(wObj.tagName)[i].className='';
		document.getElementById('ct'+mNum+'_'+i).style.display='none';
	}
	wObj.className=cClname;
	document.getElementById(ID).style.display='';
}