问题
I have created a form using struts tags. I have submitted the form asynchronously using struts jquery's submit tag. Now before i submit my form i want to call a javascript function checkUser()
, that checks if there is some client side error And prevents the form from submitting. The form with the javascript function is as follows:
<script type="text/javascript">
function loadXMLDoc() {
var xmlhttp;
var k = document.getElementById("register_userDetails_username").value;
var urls = "pass.jsp?ver=" + k;
if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
} else {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
document.getElementById("err1").innerHTML = xmlhttp.responseText;
}
};
xmlhttp.open("GET", urls, true);
xmlhttp.send();
}
</script>
<script type="text/javascript">
function checkuser() {
alert("hi");
var i = document.getElementById('err1').innerHTML.search("Unavailable");
alert(i);
var j= document.getElementById('err1').innerHTML.search("Min length:8");
alert(j);
if (i!= -1 || j!=-1) {
alert("hello");
return false;
}
alert("false");
return false;
}
</script>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib prefix="sj" uri="/struts-jquery-tags"%>
<jsp:include page="menubar.jsp"></jsp:include>
<s:form action="register" method="post" theme="css_xhtml" cssClass="form1" style="margin:8px 211px" onsubmit="return checkuser()">
<div class="searchHeader">Sign Up</div>
<div id="passwordMatchError">
<s:property value="error"/>
</div>
<s:textfield label="Name" name="userDetails.name" maxlength="30"/>
<s:textfield label="Username" name="userDetails.username" onkeyup="loadXMLDoc()" maxlength="30">
<div id="err1"></div>
</s:textfield>
<s:password label="Password" name="userDetails.password" maxlength="45"/>
<s:hidden name="userDetails.role" value='U' />
<s:password name="confirmPassword" label="Confirm Password" maxlength="45"/>
<s:radio label="Sex" name="userDetails.sex" list="#{'M':'Male','F':'Female'}" />
<s:textfield label="Phone No" name="userDetails.phoneno" maxlength="10"/>
<s:textfield label="E-mail" name="userDetails.email" maxlength="45"/>
<div id="submitdivid">
<sj:submit value="SUBMIT" cssClass="orangebuttonsmall" targets="mainContent" id="sas" />
</div>
</s:form>
Now when i enter some value in username field that already exist in db, then it shows string Unavailable
in div having id as err
.
On onsubmit
event of form , I have called checkuser
method. But with sj:submit
, onsubmit
event is not working. Can anyone help me with how to call make this onsubmit
work My aim is to prevent form from submitting , if there exists the String Unavailable
or Min Length:8
in div err
. Any alternative solutions are also accepted.
回答1:
In Head:
<script type="text/javascript">
$.subscribe('beforeSubmit', function(event,data) {
event.originalEvent.options.submit = checkuser();
});
</script>
In your tag:
<sj:submit value = "SUBMIT"
cssClass = "orangebuttonsmall"
targets = "mainContent"
id = "sas"
onBeforeTopics = "beforeSubmit"
/>
来源:https://stackoverflow.com/questions/19946043/onsubmit-event-not-working-for-asynchronous-form-submit