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Handle ENTER event key press in visual force page

 Handle ENTER event key press in visual force page OR
 Preventing default form submission and calling an action instead

<apex:page standardController="account" >
       <script type="text/javascript">      
     
   function submitListener(e){
    var keynum = 0;
    if (window.event){
        keynum = window.event.keyCode;
    }
    else if (e.which){
        keynum = e.which;
    }
    // Here we check whether the Enter button was pressed
    if (keynum == 13){
        onFormSubmit();
    }
}

 </script>

<apex:form id="orderSearchForm" onkeyup="submitListener(event)">

<apex:actionFunction name="onFormSubmit"    action="{!save}"  />

        <apex:pageBlock title="View AND Edit">

<apex:pageBlockButtons >   

                        <!--   --> <apex:commandButton action="{!cancel}" value="Cancel"/>   

              <apex:commandButton action="{!save}" value=":-)"  />

              <apex:commandButton action="{!cancel}" value="Cancel"/>

                

</apex:pageBlockButtons>

            

<apex:pageblockSection columns="2">

       <apex:pageblockSection columns="1">

                  Name:  {!account.name}

                </apex:pageblockSection>

                            <apex:pageblockSection columns="1">

                  <apex:inputField value="{!account.name}" />

                  <apex:inputField value="{!account.type}" />

                  <apex:inputField value="{!account.industry}"/>

                  <apex:inputField value="{!account.fax}" />

                </apex:pageblockSection>

            </apex:pageblockSection>            

        </apex:pageBlock>

    </apex:form>

</apex:page>