var downStrokeField;
function autojump(fieldName,nextFieldName,fakeMaxLength){
	var myForm=document.forms[document.forms.length - 1];
	var myField=myForm.elements[fieldName];
	myField.nextField=myForm.elements[nextFieldName];
		if (myField.maxLength == null)
	   myField.maxLength=fakeMaxLength;
		myField.onkeydown=autojump_keyDown;
	myField.onkeyup=autojump_keyUp;
}
function autojump_keyDown(){
	this.beforeLength=this.value.length;
	downStrokeField=this;
}
function autojump_keyUp(){
	if (
		(this == downStrokeField) &&
		(this.value.length > this.beforeLength) &&
		(this.value.length >= this.maxLength)
		)
	this.nextField.focus();
	downStrokeField=null;
}