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;
}