2.4.javascript--字符串型 

<!DOCTYPE HTML>
<html lang="en-US">
<head>
    <meta charset="UTF-8">
    <title>字符串类型</title>
</head>
<body>
    <script type="text/javascript">
    //<![DATA[
/*字符串连接
    -----------------------------------
        var str  = "Hello ";
            str += "World" + "<br/>";
            str += "I like Javascript";
        document.write( str );    
    -----------------------------------*/    
    
    
    
    /*字符串转义字符
    -----------------------------------    
        var str = "Hello World\n\tI like \nJavascript ";
            document.write( "<h1 style=\"font-family:Times;\">" + str + "</h1>" );
            document.write( '<h1 style="font-family:Times;">' + str + '</h1>' );
    -----------------------------------*/
    
    /*字符串属性方法
    -----------------------------------    

    -----------------------------------*/
        var str = "Hello";//字面量
var strObj = new String("Hello");
        var strObjRef = strObj;
        
        //alert(str == strObj);
/*
        if(str.constructor == String && strObj.constructor == String ){
            document.write("字符串类型");
        }
        */
        document.write( str.length );
        
    //]]>
</script>
</body>
</html>



 

posted @ 2012-03-14 15:57  校长阿四  阅读(174)  评论(0)    收藏  举报