<html>
  <script language="javascript">
    //var pattern = /[^"]*/;  //校驗(yàn)字符串中是否都是非雙引號(hào)的字符
    var pattern = /["]+/;    //校驗(yàn)字符串中是否有雙引號(hào)的字符
    //var pattern = /["][^"]*["]/  //匹配的是位于單引號(hào)或者雙引號(hào)之內(nèi)的0個(gè)或多個(gè)字符
    var value1 = "The best things in life are free";  //沒(méi)有雙引號(hào)的字符串
    var value2 = "/"/"The /"best things /"in life are free/"/"";  //有雙引號(hào)的字符串
    alert("value1沒(méi)有雙引號(hào)的字符串 pattern.exec_1===" + pattern.exec(value1));  //null
    alert("value1沒(méi)有雙引號(hào)的字符串 !pattern.exec_2===" + !pattern.exec(value1));  //true
    alert("value2有雙引號(hào)的字符串 pattern.exec_1===" + pattern.exec(value2));  //""
    alert("value2有雙引號(hào)的字符串 !pattern.exec_2===" + !pattern.exec(value2));  //false 
    if(pattern.exec(value1)){  //校驗(yàn)字符串中是否都是非雙引號(hào)的字符
      alert("value1 沒(méi)有加非號(hào) ++++++雙引號(hào)被匹配上");
    }
    if(!pattern.exec(value1)){    //校驗(yàn)字符串中是否有雙引號(hào)的字符
      alert("value1 有加非號(hào) ++++++雙引號(hào)被匹配上");  //頁(yè)面窗口彈出
    }
    if(pattern.exec(value2)){  //校驗(yàn)字符串中是否都是非雙引號(hào)的字符
      alert("value2 沒(méi)有加非號(hào) ++++++雙引號(hào)被匹配上");  //頁(yè)面窗口彈出
    }
    if(!pattern.exec(value2)){    //校驗(yàn)字符串中是否有雙引號(hào)的字符
      alert("value2 有加非號(hào) ++++++雙引號(hào)被匹配上");
    }
    </script>
</html>

以上代碼經(jīng)過(guò)IE8瀏覽器的測(cè)試。希望對(duì)以后遇到此類(lèi)似問(wèn)題的朋友有所幫助。

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