Javascript自定义提醒框与图像确定按钮

Question

我需要创建自定义提醒框与下一个图标图像。我用文字链接，但我不知道如何把下一个图标，而不是文字链接。我在这里添加了我的自定义提醒框功能。任何人都可以帮助做到这一点。这个图像名称为new-go-next.png在根目录中。

function createCustomAlert(txt,string_url) { 
    // shortcut reference to the document object 
    d = document; 

    // if the modalContainer object already exists in the DOM, bail out. 
    if(d.getElementById("modalContainer")) return; 

    // create the modalContainer div as a child of the BODY element 
    mObj = d.getElementsByTagName("body")[0].appendChild(d.createElement("div")); 
    mObj.id = "modalContainer"; 
    // make sure its as tall as it needs to be to overlay all the content on the page 
    mObj.style.height = document.documentElement.scrollHeight + "px"; 

    // create the DIV that will be the alert 
    alertObj = mObj.appendChild(d.createElement("div")); 
    alertObj.id = "alertBox"; 
    // MSIE doesnt treat position:fixed correctly, so this compensates for positioning the alert 
    if(d.all && !window.opera) alertObj.style.top = document.documentElement.scrollTop + "px"; 
    // center the alert box 
    alertObj.style.left = (d.documentElement.scrollWidth - alertObj.offsetWidth)/2 + "px"; 

    // create an H1 element as the title bar 
    h1 = alertObj.appendChild(d.createElement("h1")); 
    h1.appendChild(d.createTextNode(ALERT_TITLE)); 

    // create a paragraph element to contain the txt argument 
    msg = alertObj.appendChild(d.createElement("p")); 
    msg.innerHTML = txt; 

    // create an anchor element to use as the confirmation button. 
    btn = alertObj.appendChild(d.createElement("a")); 
    btn.id = "closeBtn"; 
    btn.appendChild(d.createTextNode(ALERT_BUTTON_TEXT)); 
    btn.href=""; 
    // set up the onclick event to remove the alert when the anchor is clicked 
    btn.onclick = function() { removeCustomAlert(); window.location=string_url;return false; } 


} 

Answer 1

function createCustomAlert(txt, string_url) { 
     // shortcut reference to the document object 
     d = document; 

     // if the modalContainer object already exists in the DOM, bail out. 
     if (d.getElementById("modalContainer")) return; 

     // create the modalContainer div as a child of the BODY element 
     mObj = d.getElementsByTagName("body")[0].appendChild(d.createElement("div")); 
     mObj.id = "modalContainer"; 
     // make sure its as tall as it needs to be to overlay all the content on the page 
     mObj.style.height = document.documentElement.scrollHeight + "px"; 

     // create the DIV that will be the alert 
     alertObj = mObj.appendChild(d.createElement("div")); 
     alertObj.id = "alertBox"; 
     // MSIE doesnt treat position:fixed correctly, so this compensates for positioning the alert 
     if (d.all && !window.opera) alertObj.style.top = document.documentElement.scrollTop + "px"; 
     // center the alert box 
     alertObj.style.left = (d.documentElement.scrollWidth - alertObj.offsetWidth)/2 + "px"; 

     // create an H1 element as the title bar 
     h1 = alertObj.appendChild(d.createElement("h1")); 
     h1.appendChild(d.createTextNode(ALERT_TITLE)); 

     // create a paragraph element to contain the txt argument 
     msg = alertObj.appendChild(d.createElement("p")); 
     msg.innerHTML = txt; 

     // create an anchor element to use as the confirmation button. 
     //btn = alertObj.appendChild(d.createElement("a")); 
     //btn.id = "closeBtn"; 
     //btn.appendChild(d.createTextNode(ALERT_BUTTON_TEXT)); 
     //btn.href = ""; 


     btn = alertObj.appendChild(d.createElement("img")); 
     btn.id = "closeBtn"; 
     btn.src = 'new-go-next.png'; 


     // set up the onclick event to remove the alert when the anchor is clicked 
     btn.onclick = function() { removeCustomAlert(); window.location = string_url; return false; } 


    } 

Answer 2

只是一个元件内部添加图像DOM元素。

var oImg=document.createElement("img"); 
oImg.setAttribute('src', 'next-to-go'); 
oImg.setAttribute('alt', 'na'); 
oImg.setAttribute('height', '60px'); 
oImg.setAttribute('width', '60px');  

btn.appendChild(oImg); 

Check out the jsfiddle.