function high(imgName) { imgOn='images/menu/menuo-'+imgName+".jpg"; document[imgName].src=imgOn; }
function low(imgName) { imgOff='images/menu/menu-'+imgName+".jpg"; document[imgName].src=imgOff;}	
function handleEnter (field, event) { var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;  if (keyCode == 13) {	var i; for (i = 0; i < field.form.elements.length; i++)	if (field == field.form.elements[i]) break; 	i = (i + 1) % field.form.elements.length;	field.form.elements[i].focus();	return false;	} else return true; }  
function showhide(what) { document.getElementById(what).style.visibility = "visible"; if(document.getElementById(what).style.display == "none" ) { document.getElementById(what).style.display = "";  }  else {    document.getElementById(what).style.display = "none";  } }