如果验证失败，如何显示特定文本框的q提示

Question

我正在尝试学习qtip jquery插件。我想显示验证失败的字段的qTip。我试过下面的代码但它不起作用。请让我知道我做得对不对。并建议任何使验证变得容易的插件与qTip有关。

HTML 的

<input name="issueNumber" id="issueNumber" label="" 
 placeholder="Issue number" title="Please enter issue number"></input>

JQuery的

//I used ternary operator
($('#'+namespaceInJs+'issueNumber').val()==null || 
 $('#'+namespaceInJs+'issueNumber').val()== '')
 ?displayQTip():
 alert("The value is"+$('#'+namespaceInJs+'issueNumber').val());

的JavaScript

 //I have used this function in ternary operator.Calling if validation fails.
    function displayQTip(){
        alert("IN displayQTip ");
        $('#'+namespaceInJs+'issueNumber').qtip({
            overwrite: false,
            show: {
                event: false,
                ready: true
            },
            hide: false,
            style: 'cream',
            position: {
                my: 'left center',  // Tool tip arrow place
                at: 'right center', // Place of the tool tip to the text box or target item
                target: $('#'+namespaceInJs+'issueNumber'),
            }

        });
    }