JavaScript表单验证，检查日期是否已过

Question

I'm trying to validate a form here and I'm almost done. The only issue is I can't figure out a way of validating the dates field to check whether the date that has been put in hasn't passed. It has to be done through Javascript... btw, here is the HTML:

<label for="reservationDate">Date of reservation (DD/MM/YYYY):</label>

<input type="text" id="date" name="date" onblur="validateDate(date)">

<span id="dateError" style="display: none;">Please enter your date of reservation in this format DD/MM/YYYY</span>

Here is the Javascript:

function validateDate(x) {
   var re = /^(\d{1,2})[-/.](\d{1,2})[-/.](\d{4})$/;
   if(re.test(document.getElementById(x).value)){ 
        document.getElementById(x).style.background ='#ccffcc'; 
        document.getElementById(x + 'Error').style.display = "none"; 
        return true;
   } else{ 
        document.getElementById(x).style.background ='#e35152'; 
        document.getElementById(x + 'Error').style.display = "block"; 
        return false; 
   }
}

Hope someone can help :)

Answer 1

Here's some code to make this a specific answer to suit your needs:

function validateDate(x) {
   var re = /^(\d{1,2})[-/.](\d{1,2})[-/.](\d{4})$/;
   var entered = new Date(document.getElementById(x).value);
   var today = new Date();
   if( entered > today ) {
        document.getElementById(x).style.background ='#ccffcc'; 
        document.getElementById(x + 'Error').style.display = "none"; 
        return true;
   } else{ 
        document.getElementById(x).style.background ='#e35152'; 
        document.getElementById(x + 'Error').style.display = "block"; 
        return false; 
   }
}

Here is the working, tested code: http://jsfiddle.net/digitalextremist/rwhhg/1/

Some past answers which are pieces but not really the whole deal:

• Check if date is in the past Javascript
• Validate that end date is greater than start date with jQuery
• Javascript to validate date entered