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Thread: form validation alerts but still submits form

  1. #1
    Join Date
    Jan 2013
    Posts
    3

    Unhappy form validation alerts but still submits form

    Hi,

    I would like to check if a person has filled out the email textbox and if not then alert a message and allow them to input their email address but the form sends anyway?!

    html
    Code:
    <form name="vote-form" action="javascript:return submit_vote(document.getElementById(\'vote-form\'));" id="vote-form" method="post">
                <b style="font-size:13px;">'.$question.'</b>
    			<ol id="poll-options">'.$options.'
    			</ol>
    			Email address:<br /><input type="text" name="emailaddress" id="emailaddress" /><br /><br />
    			Renewal Date:<br /><input type="text" tabindex="1" class="date demo" name="renewaldate" id="renewaldate" readonly=""><br /><br />
    			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" name="vote" onclick=\'return notEmpty()\' id="vote" value="Submit Vote" />
    			</form>

    JS
    Code:
    <script>
    window.addEvent('load', function() {
    	new DatePicker('.demo', { positionOffset: { x: 0, y: 5 }});
    });
     //VOTE POLL -------------------------------------
        function makeVote(url, parameters) {
          http_request = false;
          if (window.XMLHttpRequest) { // Mozilla, Safari,
             http_request = new XMLHttpRequest();
             if (http_request.overrideMimeType) {
             	// set type accordingly to anticipated content type
                //http_request.overrideMimeType('text/xml');
                http_request.overrideMimeType('text/html');
             }
          } else if (window.ActiveXObject) { // IE
             try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
             } catch (e) {
                try {
                   http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
             }
          }
          if (!http_request) {
             alert('Cannot create XMLHTTP instance');
             return false;
          }
          
          http_request.onreadystatechange = alertVote;
          http_request.open('POST', url, true);
          http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
          http_request.setRequestHeader("Content-length", parameters.length);
          http_request.setRequestHeader("Connection", "close");
          http_request.send(parameters);
       }
    
       function alertVote() {
          if (http_request.readyState == 4) {
             if (http_request.status == 200) {
                //alert(http_request.responseText);
                result = http_request.responseText;
                document.getElementById('vote_msg').innerHTML = result;            
             } else {
                alert('There was a problem with the request.');
             }
          }
       }
       
    
    function getCheckedValue(radioObj) {
    	if(!radioObj)
    		return "";
    	var radioLength = radioObj.length;
    	if(radioLength == undefined)
    		if(radioObj.checked)
    			return radioObj.value;
    		else
    			return "";
    	for(var i = 0; i < radioLength; i++) {
    		if(radioObj[i].checked) {
    			return radioObj[i].value;
    		}
    	}
    	return "";
    }
    function notEmpty(){
    	var myTextField = document.getElementById('emailaddress');
    	if(myTextField.value == "")
    		alert("Please enter a valid email address");
    }
    
       function submit_vote(obj) {
       	  
    	  var vote_value = getCheckedValue(document.forms['vote-form'].elements['opt']);
          var poststr = "poll_id=" + encodeURI( document.getElementById("poll_id").value ) +
          				"&emailaddress=" + encodeURI( document.getElementById("emailaddress").value ) +
          				"&renewaldate=" + encodeURI( document.getElementById("renewaldate").value ) +
                        "&voteid=" + encodeURI( vote_value);				
          makeVote('wp-content/themes/boat-zone/vote.php', poststr);	
       }
    </script>

  2. #2
    Join Date
    Dec 2005
    Location
    TX
    Posts
    7,946

    Question

    Modify your <form> tag
    Code:
    <form name="vote-form"
     action="#"
     return submit_vote(document.getElementById('vote-form'))"
     id="vote-form" method="post">
    Change the action to a valid program, if applicable

    Be sure to change the end of your submit_vote() function to return 'true' if passed or 'false' if failed.
    Difficult to tell where since you chose not to show this function.
    Last edited by JMRKER; 01-28-2013 at 08:20 PM.

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