function homeDisplay(divId) 
{
	document.getElementById('calc').style.display 			= (divId == "calc" ? "block" : "none");
	document.getElementById('about').style.display 			= (divId == "about" ? "block" : "none");
	document.getElementById('people').style.display 		= (divId == "people" ? "block" : "none");
	document.getElementById('btn3').style.display 			= (divId == "people" ? "none" : "block");
	document.getElementById('btn3on').style.display 		= (divId == "people" ? "block" : "none");
	document.getElementById('btn2').style.display 			= (divId == "about" ? "none" : "block");
	document.getElementById('btn2on').style.display 		= (divId == "about" ? "block" : "none");
	document.getElementById('btn1').style.display 			= (divId == "calc" ? "none" : "block");
	document.getElementById('btn1on').style.display 		= (divId == "calc" ? "block" : "none");
}

function loginDisplay()
{
	document.getElementById('logIn').style.display = "block";
	logIn.toggle();
}

function loginCheck() 
{
	var flag;
	var uname = document.getElementById('username').value;
	var pword = document.getElementById('password').value;
	
	if(uname.length <= 0) 	{ flag = true; } 
	if(pword.length <= 0) 	{ flag = true; } 
	
	if(flag) 				{ loginDisplay(); }
	else					{ document.getElementById('loginForm').submit(); } 
}




function toggleDiv(divId,numDiv,iD)
{
	for(i=0;i<numDiv;i++)
	{
		document.getElementById(iD + i).style.display = (divId == i ? "block" : "none");
	}
}

function marker(divId, numDiv, iD)
{
	for(i=0;i<numDiv;i++)
	{
		classvalue = (divId == i ? "on" : "off");
		document.getElementById(iD + i).className = classvalue;
	}	
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0

	if(selObj.options[selObj.selectedIndex].value != "" )
	{
		eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
		if (restore) selObj.selectedIndex=0;
	}
}

function popwin(w,h,t,l, destfile)
{
	var loc = 'width=' + w + ',height=' + h + ',top=' + t + ',left=' + l;
	calc_handle = window.open(destfile,"calc",",,,status,,scrollbars,resizable," + loc);
	if(parseInt(navigator.appVersion) >= 4)
	{
		calc_handle.window.focus();
	}
}

function doNext(original, destination)
{
	if (original.getAttribute&&original.value.length==original.getAttribute("maxlength"))
		document.getElementById(destination).focus()
}