reMail = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/

function Checkform(thisform) {

strError = 'The Following Errors Occurred:\n\n';
intError = 0;

if (thisform.Dato1.value == "Arrival")
{
strError = strError + 'Please submit arrival date ...\n'
intError = 1;
}

if (thisform.Dato2.value == "Departure")
{
strError = strError + 'Please submit departure date ...\n'
intError = 1;
}

if (intError == 1) {
alert(strError)
return false;
}

}