function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

/**********************************************************
 * External window                                        *
 **********************************************************/

function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
} 
window.onload = externalLinks;


/**********************************************************
 * Hide from email robots                                 *
 **********************************************************/
 
function nospam(user,domain) {
	locationstring = "mailto:" + user + "@" + domain;
	window.location = locationstring;
}
	
/**********************************************************
 * Email Validations                                      *
 **********************************************************/

function validateString(field, field_description, msg, min, max) {

	if (!min) { min = 1 }

	if (!max) { max = 65535 }

	if (!field.value){

		alert(msg);

		field.focus();

		field.select();

		return false;

	}

	if(field.value.length < min || field.value.max > max) {

		alert('The ' + field_description + ' field must be between ' + min + ' and ' + max + ' characters long');

		field.focus();

		field.select();

		return false;

	}

	return true;

}



function validateEmail(email, msg, optional) {

	if (!email.value && optional) {

		return true;

	}

	var re_mail = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z])+$/;

	if (!re_mail.test(email.value)) {

		alert(msg);

		email.focus();

		email.select();

		return false;

	}

	return true;

}