function makeNumeric(field,dot)
{
	var myChar = "";
	var newField = "";
	for(var i = 0; i < field.value.length; ++i)
	{
		myChar = field.value.substring(i, i+1);
		if(myChar == "0" || myChar == "1" || myChar == "2" || myChar == "3" || myChar == "4" || myChar == "5" || myChar == "6" || myChar == "7" || myChar == "8" || myChar == "9" || (dot == "Y" && myChar == "."))
		{
			if(myChar == "."){ dot = "N"; }
			var check = false;
			if(newField == "" && myChar != "0")
			{
				newField = ""+newField+myChar;
				check = true;
			}
			if(newField != "" && check == false)
			{
				newField = ""+newField+myChar;
			}
		}
	}
	if(newField == "" || newField == null){ newField = "0"; }
	field.value = ""+newField;

}