How to display error message in a jsp

if(e开发者_StackOverflowmailVal == '') {
              $("#email").after('<span class="error"><font color="red">Please enter your email address.</span>');
              hasError = true;
          }

when i use above javascript, message displays besides email textbox

<form:input path="email"  id="email"/>
             <c:if test="${!empty is_exist_user}">
             <span class="error"><font color="red">${is_exist_user}</font></span>               
            </c:if>

but when i use above code in jsp file, message displays below email textbox, how can i get this textbox besides email textbox

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Either use CSS to tweak whatever is produced by whatever custom tag that is, modify the html produced by that custom tag, or don't use the custom tag.