function changeSEvent(action)
{
	if (action=="+1") {
		if (document.getElementById("changeSelect").selectedIndex > 0 ) {
			document.getElementById("changeSelect").selectedIndex = document.getElementById("changeSelect").selectedIndex - 1;
		}
	}

	if (action=="-1") {
		if (document.getElementById("changeSelect").selectedIndex < eval(document.getElementById("changeSelect").options.length-1) ) {
			document.getElementById("changeSelect").selectedIndex = document.getElementById("changeSelect").selectedIndex + 1;
		}
	}
	
	if (document.getElementById("changeSelect").selectedIndex == 0) {
		document.getElementById("pButton").style.display="none";
		document.getElementById("nButton").style.display="block";
	}
	else {
		document.getElementById("pButton").style.display="block";
	}

	if (document.getElementById("changeSelect").selectedIndex == eval(document.getElementById("changeSelect").options.length-1)) {
		document.getElementById("nButton").style.display="none";
		document.getElementById("pButton").style.display="block";
	}
	else {
		document.getElementById("nButton").style.display="block";
	}

	curSevn = document.getElementById("changeSelect").options[document.getElementById("changeSelect").selectedIndex].value;

	//alert(curSevn);

	return curSevn;
//	if (action=="noAction") 
//	{
//	}
//	else 
//	{
		//var execActionFunction;
//		if (execActionFunction == true)
//		{
//			execAction(curSevn);
//		}
//	}

}