RegEx character limits
var nameRegex = /^[a-zA-Z]+(([',.-][a-zA-Z])?[a-zA-Z]*)*$/;

var emailRegex = /^[w-.]+@([w-]+.)+[w-]{2,4}$/;

// original
      var messageRegex =
new RegExp(/</?w+((s+w+(s*=s*(?:".*?"|'.*?'|[^'">s]+))?)+s*|s*)/?>/gim);

// would this work?
      var messageRegex =
new RegExp(/</?w+((s+w+(s*=s*(?:".*?"|'.*?'|[^'">s]+))?)+s*|s*)/?>/gim){250,250}$/;

// Would match any input with A-z 0-9 or _ in any position, given at least one char.
var nameRegex = /^[A-Za-zd_]+$/;

/* Comment out some code
var myRe = /[a-z]*/i; // The comment stops before the i.
*/ // This line breaks your code.