function URLEncode (clearString) {
  var output = '';
  var x = 0;
  clearString = clearString.toString();
  var regex = /(^[a-zA-Z0-9_.]*)/;
  while (x < clearString.length) {
    var match = regex.exec(clearString.substr(x));
    if (match != null && match.length > 1 && match[1] != '') {
    	output += match[1];
      x += match[1].length;
    } else {
      if (clearString[x] == ' ')
        output += '+';
      else {
        var charCode = clearString.charCodeAt(x);
        var hexVal = charCode.toString(16);
        output += '%' + ( hexVal.length < 2 ? '0' : '' ) + hexVal.toUpperCase();
      }
      x++;
    }
  }
  return output;
}

function SubmitOnEnter(myfield, e)
{
	var keycode;
	if (window.event)
		keycode = window.event.keyCode;
	else if (e)
		keycode = e.which;
	else
		return true;
	if (keycode == 13)
	{
		SearchSite();
		return false;
	}
	else
		return true;
}
function SearchSite()
{
document.location.href='http://esgr.org/site/GoogleSearchResults/tabid/226/Default.aspx?cx=007182047788211446319%3Awecuwa_besc&cof=FORID%3A10&ie=UTF-8&q=' + 
URLEncode(document.getElementById('gcse_q').value) + '&sa=Search';
}


function checkEnter(e){ //e is event object passed from function invocation
var characterCode

if(e && e.which){ //if which property of event object is supported (NN4)
e = e
characterCode = e.which //character code is contained in NN4's which property
}
else{
e = event
characterCode = e.keyCode //character code is contained in IE's keyCode property
}

if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
SearchSite(); //submit the form
return false;
}
else{
return true;
}

}