function update_employees()
{
		var lost_days_per_year=document.getElementById("employees").value*22.34;
		document.getElementById("lost_days_per_year").innerHTML=Math.floor(lost_days_per_year);
		update_wages();
}

function update_wages()
{
	var employees=document.getElementById("employees").value;
	var salary=document.getElementById("salary").value;
	var wages=Math.floor(employees*salary*0.0894);
	document.getElementById("lost_days_per_year").innerHTML=Math.floor(employees*22.34);
	document.getElementById("unproductive_wages_per_year").innerHTML="£"+wages;
}

function check_numeric(event)
{
	var key;
	var undefined;
	if (event.which==undefined) 
	{
		key=event.keyCode; //MS
	}
	else
	{
		key=event.which //Mozilla
	}
	if (key>=48 && key <=57) return true;
	if (key==0 | key==8) return true;
	return false;
}