function startcode() {
	txtbox = document.getElementById('aimscreenname');
	txtbox.focus();
	txtbox.select();
	
	txtbox.onfocus = function () {
		txtbox = document.getElementById('aimscreenname');
		if (txtbox.value.toLowerCase() == "your aim sn") {
			txtbox.value="";
			
		}
	}
}
window.onload = startcode;