function isValidEmail(email){if(email.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/)!=-1){return true;}
else{alert("This does not appear to be a valid e-mail address.\nPlease enter your e-mail address in the form: you@you.com");return false;}}
function emailCheck(emailStr,field){var alertmsg=true;if(emailCheck.arguments.length==2)alertmsg=emailCheck.arguments[1];if(emailStr.length>0){var emailPat=/^(.+)@(.+)$/;var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";var validChars="\[^\\W"+specialChars+"\]";var quotedUser="(\"[^\"]*\")";var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;var atom=validChars+'+';var word="("+atom+"|"+quotedUser+")";var userPat=new RegExp("^"+word+"(\\."+word+")*$");var domainPat=new RegExp("^"+atom+"(\\."+atom+")*$");var matchArray=emailStr.match(emailPat);if(matchArray==null){if(alertmsg){alert("The current e-mail address seems to be incorrect. Please check the @ and the '.'");document.getElementById(field).focus();return false;}}
var user=matchArray[1];var domain=matchArray[2];if(user.match(userPat)==null){if(alertmsg){alert("The current e-mail address seems to be incorrect. Please check the username.");document.getElementById(field).focus();return false;}}
var IPArray=domain.match(ipDomainPat);if(IPArray!=null){for(var i=1;i<=4;i++){if(IPArray[i]>255){if(alertmsg){alert("The current e-mail address seems to be incorrect. Please check the IP-adres.");document.getElementById(field).focus();return false;}}}
return true;}
var domainArray=domain.match(domainPat)
if(domainArray==null){if(alertmsg){alert("The current e-mail address seems to be incorrect. Please check the domain.");document.getElementById(field).focus();return false;}}
var atomPat=new RegExp(atom,"g");var domArr=domain.match(atomPat);var len=domArr.length;if(domArr[domArr.length-1].length<2||domArr[domArr.length-1].length>3){if(alertmsg){alert("The current e-mail address seems to be incorrect. An e-mail address usually ends on with two or three letters.");document.getElementById(field).focus();return false;}}
if(len<2){var errStr="The current e-mail address seems to be incorrect. Please check the domain.";if(alertmsg){alert(errStr);document.getElementById(field).focus();return false;}}}
return true;}
function trim(inputString){if(typeof inputString!="string"){return inputString;}
var retValue=inputString;var ch=retValue.substring(0,1);while(ch==" "){retValue=retValue.substring(1,retValue.length);ch=retValue.substring(0,1);}
ch=retValue.substring(retValue.length-1,retValue.length);while(ch==" "){retValue=retValue.substring(0,retValue.length-1);ch=retValue.substring(retValue.length-1,retValue.length);}
while(retValue.indexOf("  ")!=-1){retValue=retValue.substring(0,retValue.indexOf("  "))+retValue.substring(retValue.indexOf("  ")+1,retValue.length);}
return retValue;}