//Form validation script

function checkForm()
{
    var cname,carea,cexchange,cnumber,cemail,cmessage;
    with(window.document.msgform)
    {
      
		//ctitle = title;
        cname    = sname;
		//clname = lname;
	    carea = area;	
		cexchange= exchange;
		cnumber  =number;
        cemail   = email;
		cmessage = message;
		//cfax   = fax;
		//clunchtime= lunchtime;
		//cdinnertime= dinnertime;
		//cdate = bookingdate;
		//cguest = guest;
		//cevent = eventtype;
		
       // csubject = subject;
        //cmessage = message;
    }
		
	 if(trim(cname.value) == '')
    {
        alert('Please enter your name');
        cname.focus();
        return false;
    }
	
	else if ((carea.value == '') || isNaN(carea.value) || (carea.value.length !=3))   {
	 	alert("Need a valid phone number !");
		carea.focus();
		return false;
}	

else if ((cexchange.value == '') || isNaN(cexchange.value) || (cexchange.value.length !=3))  {
	 	alert("Need a valid phone number !");
		cexchange.focus();
		return false;
}
	

else if ((cnumber.value == '') || isNaN(cnumber.value) || (cnumber.value.length !=4))  {
	 	alert("Need a valid phone number !");
		cnumber.focus();
		return false;
}
	
	  else if(trim(cemail.value) == '')
    {
        alert('Please enter your email');
        cemail.focus();
        return false;
    }
    else if(!isEmail(trim(cemail.value)))
    {
        alert('Email address is not valid');
        cemail.focus();
        return false;
    }	
	 if(trim(cmessage.value) == '')
    {
        alert('Please enter your message');
        cmessage.focus();
        return false;
    }

    
    else
    {
        cname.value    = trim(cname.value);
		//clname.value    = trim(clname.value);
		carea.value    = trim(carea.value);
		cexchange.value  = trim(cexchange.value);
		cnumber.value    = trim(cnumber.value);
        cemail.value   = trim(cemail.value);
		cmessage.value   = trim(cmessage.value);
      //  cfax.value   = trim(cfax.value);
		//clunchtime.value    = trim(clunchtime.value);
		//cdinnertime.value    = trim(cdinnertime.value);
		//cdate.value    = trim(cdate.value);
		//cdate.value    = trim(cdate.value);
        //cguest.value = trim(cguest.value);
		//cevent.value    = trim(cevent.value);
       // cmessage.value = trim(cmessage.value);
        return true;
    }
}

/*
Strip whitespace from the beginning and end of a string
Input : a string
*/
function trim(str)
{
    return str.replace(/^\s+|\s+$/g,'');
}

/*
Check if a string is in valid email format. 
Returns true if valid, false otherwise.
*/
function isEmail(str)
{
    var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
    return regex.test(str);
}