function check(){
	var ddd = document.getElementById("ddd").value;
	var ddm = document.getElementById("ddm").value;
	var ddy = document.getElementById("ddy").value;
	var dtime = document.getElementById("dtime").value;
	var dhour = (dtime.indexOf("AM") != -1)?dtime.substr(0,2):parseInt(dtime.substr(0,2))+12;
	var dmin = dtime.substr(2,2);
	var rdd = document.getElementById("rdd").value;
	var rdm = document.getElementById("rdm").value;
	var rdy = document.getElementById("rdy").value;
	var rtime = document.getElementById("rtime").value;
	var rhour = (rtime.indexOf("AM") != -1)?rtime.substr(0,2):parseInt(rtime.substr(0,2))+12;
	var rmin = rtime.substr(2,2);	
	var depDate = new Date(ddm+" "+ddd+", 20"+ddy+" "+dhour+":"+dmin+":00");
	var arrDate = new Date(rdm+" "+rdd+", 20"+rdy+" "+rhour+":"+rmin+":00");
	if(document.getElementById("selAirport").value == 0){
		alert("Please select an airport.");
		return false;
	}
	if(Date.parse(depDate) > Date.parse(arrDate)){
		alert("Your return date cannot be before your departure date.");
		return false;
	}else{
		document.getElementById("ddate").value = ddm+"/"+ddd+"/"+ddy;
		document.getElementById("ddt").value = dtime.substr(4,2);
		document.getElementById("dhour").value = dtime.substr(0,2);
		document.getElementById("dminute").value = dtime.substr(2,2);
		document.getElementById("dtime").value = rtime;
		document.getElementById("rdate").value = rdm+"/"+rdd+"/"+rdy;
		document.getElementById("rdt").value = rtime.substr(4,2);
		document.getElementById("rhour").value = rtime.substr(0,2);
		document.getElementById("rminute").value = rtime.substr(2,2);
		document.getElementById("rtime").value = rtime;
	}
}