function check_rental_detail(objForm){

	var objPickDate = objForm.elements["pickup-year-dd"];
	var pick_date = objPickDate.value;
	var pick_month = objForm.elements["pickup-year-mm"].value;
	var pick_year = objForm.elements["pickup-year"].value;

	var objDropDate = objForm.elements["dropoff-year-dd"];

	var drop_date = objDropDate.value;
	var drop_month = objForm.elements["dropoff-year-mm"].value;
	var drop_year = objForm.elements["dropoff-year"].value;

	var today = new Date();

	var pickup_timestamp = new Date(pick_year, pick_month-1, pick_date, today.getHours(), today.getMinutes(), today.getSeconds(), today.getMilliseconds());
	var dropoff_timestamp = new Date(drop_year, drop_month-1, drop_date, today.getHours(), today.getMinutes(), today.getSeconds(), today.getMilliseconds());
	var one_day = 1000*60*60*24;
	var day_diff = Math.ceil((dropoff_timestamp.getTime()-pickup_timestamp.getTime())/(one_day));

	if(pickup_timestamp < today)
	{
		alert ("You can not book before today's date");
		objPickDate.focus();
		return false;
	}
	else if(dropoff_timestamp < today)
	{
		alert ("You can not book before today's date");
		objDropDate.focus();
		return false;
	}else if(day_diff < 0){
		alert("Please check your date");
		objDropDate.focus();
		return false;
	}else if(pick_date == ''){
		alert("Please select pickup.")
		objPickDate.focus();
		return false;
	}else if(drop_date == ''){
		alert("Please select dropoff.")
		objDropDate.focus();
		return false;
	}else{
		return true;
	}
}