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JS implements the star rating function

小云云Original: 2018-03-02 15:40:532287browse

This article mainly shares with you the JS implementation of the star rating function, hoping to help everyone.

<!DOCTYPE html><html lang="en"><head>
    <meta charset="UTF-8">
    <title>点亮星星评分</title></head><body  onload="test()"><table id ="czy">
    <tr>
        <td>★</td><td>★</td><td>★</td><td>★</td><td>★</td>
    </tr></table><input type="button" id="ok" value="打分"><script>
    tds=document.getElementsByTagName("td");    for(var i=0;i<tds.length;i++){
        tds[i].onmouseover=test;
    }    var index;    function  test(){

        for(var i=0;i<tds.length;i++){            if(tds[i]==this)
            {
                index=i;
            }
        }        for(var i=0;i<=index;i++) {
            tds[i].style.color = "red";
        }        for(var i=index+1;i<tds.length;i++){
            tds[i].style.color="black";
        }
    }
    document.getElementById("ok").onclick=function(){
        alert("评分："+(index+1)+"分");
    }</script></body></html>

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