// JavaScript Document

function checkjoinform (form) {	
	
	// ** START **	
	// Checking if at least one period button is selected. Or not. 
	if (!document.form.people[0].checked && !document.form.people[1].checked && !document.form.people[2].checked && !document.form.people[3].checked){ 
		alert("Please select if Accommodation os needed"); 
		return false;}
    // ** END **
	
	// ** START **
    if (form.name.value == "") {
        alert( "Please enter your Full Name" );
        form.name.focus();
        return false ;
    }
    // ** END **
	// ** START **
    if (form.phone.value == "") {
        alert( "Please enter your Phone Number" );
        form.phone.focus();
        return false ;
    }
    // ** END **
	// ** START **
    if (form.email.value == "") {
        alert( "Please enter your Email Address" );
        form.email.focus();
        return false ;
    }
	   // check for valid e-mail address
	if (form.email.value.indexOf("@")<1 ||
    	form.email.value.indexOf(".")==-1 ||
    	form.email.value.indexOf(",")!=-1 ||
    	form.email.value.indexOf(" ")!=-1 ||
    	form.email.value.length<6)
  	{
    	alert("Please enter a valid E-mail address.\n" +
    	"Example: myname@domainname.com");
    	form.email.focus();
    	return false
  	}
    // ** END **
	
		// ** START **
    if (form.emailconfirm.value == "") {
        alert( "Please enter your Email Address" );
        form.emailconfirm.focus();
        return false ;
    }
	   // check for valid e-mail address
	if (form.emailconfirm.value.indexOf("@")<1 ||
    	form.emailconfirm.value.indexOf(".")==-1 ||
    	form.emailconfirm.value.indexOf(",")!=-1 ||
    	form.emailconfirm.value.indexOf(" ")!=-1 ||
    	form.emailconfirm.value.length<6)
  	{
    	alert("Please enter a valid E-mail address.\n" +
    	"Example: myname@domainname.com");
    	form.emailconfirm.focus();
    	return false
  	}
    // ** END **
	// ** START **
    if (form.tripdate.value == "") {
        alert( "Please enter preferred Date" );
        form.tripdate.focus();
        return false ;
    }
    // ** END **
	// ** START **
    if (form.people.value == "") {
        alert( "Please enter No of People" );
        form.people.focus();
        return false ;
    }
    // ** END **
	
	return true ;
}
//-->

<!-- END of Form Validation -->