JForm

    <!--html-->
    <form id="test_form">
    	    <input type="text" name="username" dtype="uname" min-length="6" max-length="20" required>
        	<input type="text" name="email" dtype="email" required>
    	    <input type="checkbox" name="tag[]" min-check="1" max-check="3" required>
    	    option 1
    	    <input type="checkbox" name="tag[]"> option 2
    	    <input type="checkbox" name="tag[]"> option 3
    	    <input type="checkbox" name="tag[]"> option 4
    </form>

    //js
    var options = {
        formId : '',        
        filter : function( ele ) {  
            return $(ele).attr('required') == undefined;
        },
        
        continueCheck : false,

        showMessage : function( type, message, ele ) { 
            if ( $(ele).attr("dtype") != 'password' ) {
                JDialog.tip.work({type:type, content:message, timer : 2000});
            }
            if ( type == 'error' ) JForm.options.checkSuccess = false;
        }
    };
    var form = new JForm(options);
    if ( form.checkFormData() ) {
        alert("验证成功！");
    }