var msg = "Welcome to McCord Machinery - UK & Ireland's Agricultural Machinery And Supplies Specialist";
var chars = msg.length + 1;
var updateStatus = "";
var i = 0;

function statusbar(){
	if(i < chars) 
   	   setTimeout("nextLetter()", 200);
}

function nextLetter(){
	updateStatus = msg.substring(0,i) + '_';
	window.status = updateStatus;
	i++;
	statusbar();
}