注册除特定元素之外的单击

时间:2011-12-15 13:09:23

标签: javascript input onblur hints

我有一个javasccript函数,当用户填写表单时单击输入以显示提示时显示或隐藏“跨度”:

function prepareInputsForHints() {
var inputs = document.getElementsByTagName("input");

for (var i=0; i<inputs.length; i++){
    // test to see if the hint span exists first
    if (inputs[i].parentNode.getElementsByTagName("span")[0]) {
        // the span exists!  on focus, show the hint
        inputs[i].onfocus = function () {
            this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
        }
        // when the cursor moves away from the field, hide the hint
        inputs[i].onblur = function () {
            this.parentNode.getElementsByTagName("span")[0].style.display = "none";
        }
    }
}
}

我的问题是,当我尝试添加提示文本的链接时,用户无法单击它,因为它首先注册onblur事件和提示消失,所以我想知道如何修改此功能,以便单击提示时它不会隐藏。

2 个答案:

答案 0 :(得分:1)

您可以使用boolean var来测试用户是否使用鼠标悬停在提示上,然后如果onblur而不是mouseOver则隐藏您的提示。

你的循环中有这样的东西:

var inputs = document.getElementsByTagName("input");
for (var i=0; i<inputs.length; i++){
    (function(i) {
        // Let the code cleaner :)
        var span = inputs[i].nextElementSibling;

        span.onmouseover = function() { this.isOver = true; }
        span.onmouseout = function() { this.isOver = false; if(!inputs[i].isFocus) inputs[i].onblur(); }

        // the span exists!  on focus, show the hint
        inputs[i].onfocus = function () {
            this.isFocus = true;
            span.style.display = "inline";
        }
        // when the cursor moves away from the field, hide the hint
        inputs[i].onblur = function () {
            this.isFocus = false;
            if(!span.isOver) span.style.display = "none";
        }
    })(i);
}

我将自执行函数放在var i范围内,你没有onmouseout函数的麻烦。

编辑:更新了示例

获取下一个范围的代码不起作用,因此我更改为nextElementSibling,因为您放入jsfiddler的示例。

答案 1 :(得分:0)

这是新的工作代码:

$(function(prepareInputsForHints) {
var inputs = document.getElementsByTagName("input");
for (var i=0; i<inputs.length; i++){
    (function(i) {
        // Let the code cleane
        var span = inputs[i].nextElementSibling;

    if(span instanceof HTMLSpanElement) {

if(span.className == "hint") {


        span.onmouseover = function() { this.isOver = true; }
        span.onmouseout = function() { this.isOver = false; if(!inputs[i].isFocus) inputs[i].onblur(); }

        // the span exists!  on focus, show the hint
        inputs[i].onfocus = function () {
            this.isFocus = true;
            span.style.display = "inline";
        }
        // when the cursor moves away from the field, hide the hint
        inputs[i].onblur = function () {
            this.isFocus = false;
            if(!span.isOver) span.style.display = "none";
        }
}       
    }
    })(i);
}
});