JavaScript实现星级评分

2019-11-19 17:58:52

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事件onmouseover

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head> <title>JavaScript星级评分</title> <style type="text/css"> *{margin:0;padding:0;} .wrapper{height:20px;padding:5px;width:130px;margin:100px auto 10px;} </style> <script type="text/javascript">  function ArrayIndexOf(arr, element) {   for (var i = 0; i < arr.length; i++) {    if (arr[i] == element) {     return i;    }   }   return -1;  }  function GetTds() {   var tbl = document.getElementById("tblMain");   var tds = tbl.getElementsByTagName("td");   return tds;  }  function InitEvent() {   var tds=GetTds();   for (var i = 0; i < tds.length; i++) {    var td = tds[i];    td.onmouseover = TdOnclick;    td.style.cursor = "pointer";   }  }  function TdOnclick() {   var tds = GetTds();   var index = ArrayIndexOf(tds, this);    for (var i = 0; i <=index; i++) {    var td = tds[i];    td.innerHTML = "★";   }   for (var j = index + 1; j < tds.length; j++) {     var td = tds[j];    td.innerHTML = "☆";   }  } </script></head><body onload="InitEvent()" class="wrapper"><table id="tblMain"><tr><td>☆</td><td>☆</td><td>☆</td><td>☆</td><td>☆</td></tr></table></body></html>

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