Code:
function alertUser(id)
{
	//alert("FUNCTION: alertUser");
	//alert("id = " + id);
	var df = document.forms["form"];
	var doc = document.form;
	
	if (df.elements[id].value != "")
	{
		df.elements[id].value = "";
		df.elements[id].focus();
		alert("The Seat must contain a letter for the row identifer\ne.g 22A");
		return false;
	}
	
}

seat_zelle.innerHTML = "<input type='text' id='specify"+s+"' name='specify"+s+"' "+
					   "title='Insert Seat Number for Pax: "+ passagier + " " + passNo + " / Segment "+ parseFloat(s+1) +"' "+
					   "class='selects' size='5' onBlur='if(!/^.*[a-z].*/i.test(this.value)){alertUser(this.id);}; 	concatSeats(this.value,"+passNo+",this.id,"+pass+");' "+
"onKeyUp='this.value=this.value.toUpperCase(); return IsNumeric(this.value,this.id);' />";
the alertUser function is called by the textbox onBlur.

Is there a way to show the title without mouseing over the textbox?

Just after the alert (alert("The Seat must contain a letter for the row identifer\ne.g 22A") has been shown?

Picco