function select_but(x)
{
	var but1 = 'inbox';
	var but2 = 'sent';
	var but3 = 'compose';
	var but4 = 'notify';
	var but5 = 'updates';
		
	document.getElementById(x).className = "selected";
	
	if(but1 != x)
	{
		document.getElementById(but1).className = "";
	}if(but2 != x){
		document.getElementById(but2).className = "";
	}if(but3 != x){
		document.getElementById(but3).className = "";
	}if(but4 != x){
		document.getElementById(but4).className = "";
	}if(but5 != x){
		document.getElementById(but5).className = "";
	}
}