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我想弄清楚如何计算用户输入的入住日期和结帐日期之间的天数。我需要把这个数字加上他们选择的房间选择,以获得他们逗留的总费用,并将其显示在屏幕上的某个地方。如何计算“入住日期”和“结帐日期”之间的天数?
我不完全确定如何计算天数,但为了获得房间的成本,我需要为每种类型的房间分配一个ID并为其指定一个数值而不是当前设置I现在有吗?或者你还可以为每个房间的选择分配一个值?
<script>
\t \t \t function check() {
\t \t \t \t if(document.getElementById('checkin').value > document.getElementById('checkout').value)
\t \t \t \t \t {
\t \t \t \t \t \t alert("Check-out date must be after check-in date!")
\t \t \t \t }
\t \t \t }
\t \t \t
\t \t \t //function result() {
\t \t \t \t //document.getElementById('standard').value *
\t \t \t //}
</script>
\t <body>
\t <form>
\t <fieldset>
\t <legend>test</legend>
\t \t \t First Name: <br>
\t \t \t <input type="text" name="firstname" size="45" pattern="[A-Za-z]+" title="Alphabet characters only." required>
\t \t \t <br><br>
\t \t \t Last Name: <br>
\t \t \t <input type="text" name="lastname" size="45" pattern="[A-Za-z]+" title="Alphabet characters only." required>
\t \t \t <br><br>
\t \t \t Street Address: <br>
\t \t \t <input type="text" name="street" size="45" pattern="[A-Za-z0-9 ]+" title="Alphabet characters and numbers only." required>
\t \t \t <br><br>
\t \t \t City: <br>
\t \t \t <input type="text" name="city" size="45" pattern="[A-Za-z ]+" title="Alphabet characters only." required>
\t \t \t <br><br>
\t \t \t State: <br>
\t \t \t <input list="states" name="state" size="45" required>
\t \t \t \t <datalist id="states">
\t \t \t \t \t \t <option value="AL">Alabama</option>
\t \t \t \t \t \t <option value="AK">Alaska</option>
\t \t \t \t \t \t <option value="AZ">Arizona</option>
\t \t \t \t \t \t <option value="AR">Arkansas</option>
\t \t \t \t \t \t <option value="CA">California</option>
\t \t \t \t \t \t <option value="CO">Colorado</option>
\t \t \t \t \t \t <option value="CT">Connecticut</option>
\t \t \t \t \t \t <option value="DE">Delaware</option>
\t \t \t \t \t \t <option value="FL">Florida</option>
\t \t \t \t \t \t <option value="GA">Georgia</option>
\t \t \t \t \t \t <option value="HI">Hawaii</option>
\t \t \t \t \t \t <option value="ID">Idaho</option>
\t \t \t \t \t \t <option value="IL">Illinois</option>
\t \t \t \t \t \t <option value="IN">Indiana</option>
\t \t \t \t \t \t <option value="IA">Iowa</option>
\t \t \t \t \t \t <option value="KS">Kansas</option>
\t \t \t \t \t \t <option value="KY">Kentucky</option>
\t \t \t \t \t \t <option value="LA">Louisiana</option>
\t \t \t \t \t \t <option value="ME">Maine</option>
\t \t \t \t \t \t <option value="MD">Maryland</option>
\t \t \t \t \t \t <option value="MA">Massachusetts</option>
\t \t \t \t \t \t <option value="MI">Michigan</option>
\t \t \t \t \t \t <option value="MN">Minnesota</option>
\t \t \t \t \t \t <option value="MS">Mississippi</option>
\t \t \t \t \t \t <option value="MO">Missouri</option>
\t \t \t \t \t \t <option value="MT">Montana</option>
\t \t \t \t \t \t <option value="NE">Nebraska</option>
\t \t \t \t \t \t <option value="NV">Nevada</option>
\t \t \t \t \t \t <option value="NH">New Hampshire</option>
\t \t \t \t \t \t <option value="NJ">New Jersey</option>
\t \t \t \t \t \t <option value="NM">New Mexico</option>
\t \t \t \t \t \t <option value="NY">New York</option>
\t \t \t \t \t \t <option value="NC">North Carolina</option>
\t \t \t \t \t \t <option value="ND">North Dakota</option>
\t \t \t \t \t \t <option value="OH">Ohio</option>
\t \t \t \t \t \t <option value="OK">Oklahoma</option>
\t \t \t \t \t \t <option value="OR">Oregon</option>
\t \t \t \t \t \t <option value="PA">Pennsylvania</option>
\t \t \t \t \t \t <option value="RI">Rhode Island</option>
\t \t \t \t \t \t <option value="SC">South Carolina</option>
\t \t \t \t \t \t <option value="SD">South Dakota</option>
\t \t \t \t \t \t <option value="TN">Tennessee</option>
\t \t \t \t \t \t <option value="TX">Texas</option>
\t \t \t \t \t \t <option value="UT">Utah</option>
\t \t \t \t \t \t <option value="VT">Vermont</option>
\t \t \t \t \t \t <option value="VA">Virginia</option>
\t \t \t \t \t \t <option value="WA">Washington</option>
\t \t \t \t \t \t <option value="WV">West Virginia</option>
\t \t \t \t \t \t <option value="WI">Wisconsin</option>
\t \t \t \t \t \t <option value="WY">Wyoming</option>
\t \t \t \t \t </datalist>
\t \t \t <br><br>
\t \t \t Zip Code: <br>
\t \t \t <input type="text" name="zipcode" size="45" pattern="[0-9]+" title="Numbers only." required>
\t \t \t <br><br>
\t \t \t Phone Number: <br>
\t \t \t <input type="text" name="phone" size="45" pattern="[0-9-]+" title="Numbers only." required>
\t \t \t <br><br>
\t \t \t E-mail: <br>
\t \t \t <input type="email" name="email" size="45" pattern="[a-z0-9._%+-][email protected][a-z0-9.-]+\.[a-z]{2,3}$" required>
\t \t \t <br><br>
\t \t \t Check-In Date:<br>
\t \t \t <input type="date" id="checkin" name="checkin" required>
\t \t \t <br><br>
\t \t \t Check-Out Date:<br>
\t \t \t <input type="date" id="checkout" name="checkout" required>
\t \t \t <br><br>
\t \t \t Room:<br>
\t \t \t <input list="rooms" name="room" size="16" required>
\t \t \t \t <datalist id="rooms">
\t \t \t \t \t <option value="Standard ($50/night)">
\t \t \t \t \t <option value="Queen ($75/night)">
\t \t \t \t \t <option value="King ($100/night)">
\t \t \t \t \t <option value="Business ($125/night)">
\t \t \t \t \t <option value="Deluxe Suite ($150/night)">
\t \t \t \t </datalist>
\t \t \t <br><br>
\t \t \t <button type="submit" onclick="check()">Submit</button>
\t \t \t </fieldset>
\t </form>
</body>