find 找字串,indexOf var str1='<img src="img_girl.jpg" width="500" height="600" style="width: 32px; height: 32px;" >' var n1 = str1.indexOf('style="'); var n2 = str1.indexOf('"',n1); document.getElementById('powenko').innerHTML = n1+","+n2; 輸出: 49,55 Doc navigation← 編碼-encodeURI decodeURIsubstring 取得部分字串 →