function checkfields() 
{
 var msg="(*)Please enter...\n\n";
if ( document.booknow.pdt.value.length < 1 ) {
				msg +="Pick-Up Date!\n";
				}
if ( document.booknow.ploc.value == 'loc' ) {
				msg +="Pick-Up Location!\n";
				}
if ( document.booknow.fltnop.value.length < 1 ) {
				msg +="Flight No.(Arrival)!\n";
				}
if ( document.booknow.ddt.value.length < 1 ) {
				msg +="Drop-Off Date!\n";
				}
if ( document.booknow.dloc.value == 'loc' ) {
				msg +="Drop-Off Location!\n";
				}
if ( document.booknow.fltnod.value.length < 1 ) {
				msg +="Flight No.(Departure)!\n";
				}

	
	if(msg=="(*)Please enter...\n\n") 
        { 
            return true;
        } 
        else 
        { 
            alert(msg); 
            return false; 
        } 			
}