復制代碼 代碼如下:
<!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> new document </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style>
body { font-size:12px; }
#show { background-color:#CCFF99; }
</style>
</head>
<body>   
<textarea cols="30" rows="10">
河中魚類離奇死亡,下游居民頻染怪病,沿岸植物不斷變異,是殘留農藥?還是生化攻擊?敬請關注今晚CCTV-10《科學探索》,即將播出的專題節目:《神秘的河邊洗腳人--中國男足》
</textarea>   
<button>獲取選中值</button>
<div></div>
<script>   
    String.prototype.trim = function() {    
         return this.replace(/^/s+|/s+$/g, "");    
     } 
  /* 方法一 FF下有點問題 */
     function getSelectText() {   
        try{
            // IE: document.selection.createRange() W3C:window.getSelection()
            var selectText = (document.selection && document.selection.createRange )? document.selection.createRange().text : window.getSelection().toString();
            if(selectText != null && selectText.trim() != ""){
               return selectText;
            }
        }catch(err){}
     }      
 /* 方法二 */
 function getSelectText2(id) {
  var t = document.getElementById(id);
  if(window.getSelection) {
   if(t.selectionStart != undefined && t.selectionEnd != undefined) {
    return t.value.substring(t.selectionStart, t.selectionEnd);
   } else {
    return "";
   }
  } else {
   return document.selection.createRange().text;
  }
  }
  document.getElementById('btn').onclick = function() {
   document.getElementById('show').innerHTML = getSelectText2('content');
  }
</script>
</body>   
</html>   
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