function html2entities(){
var re=/[\\/<>{}*"'`,&$:#%]/g
for (i=0; i<arguments.length; i++)
arguments[i].value=arguments[i].value.replace(re, function(m){return replacechar(m)})
}

function replacechar(match){
if (match=="<")
  return ""
else if (match==">")
  return ""
else if (match=="\"")
  return ""
else if (match=="\\")
  return ""
else if (match=="/")
  return ""
else if (match=="'")
  return ""
else if (match=="&")
  return ""
else if (match=="*")
  return ""
else if (match=="{")
  return ""
else if (match=="}")
  return ""
else if (match=="$")
  return ""
else if (match=="`")
  return ""
else if (match==",")
  return ""
else if (match==":")
  return ""
else if (match=="#")
  return ""
else if (match=="%")
  return ""
}