javascript遍歷控件實(shí)例詳細(xì)解析

2019-11-20 21:16:34

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供稿：網(wǎng)友

js遍歷頁面控件，

 var inputArr = document.forms[0];
   for( var i = 0; i < inputArr.length; i++ ) {
    if( inputArr[i].type.toUpperCase() == "BUTTON" ) {
     inputArr[i].disabled="disabled";
    }else if( inputArr[i].type.toUpperCase() == "FILE" ){     
     inputArr[i].readonly=true;
    }
   }
 

另一種方法：

復(fù)制代碼代碼如下:

var Elements = document.getElementsByTagName_r("*");
var msgs;
var i;
for ( i in Elements ) {
if ( Elements[i].type == "text" ) {
alert(Elements[i].value);
}
}

JS遍歷控件取值

復(fù)制代碼代碼如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>JS遍歷控件取值</title>
    <mce:script type="text/javascript"></mce:script>
</head>
<body>
    <table>
        <tr>
            <td style="width: 100px">
                <input id="Checkbox1" type="checkbox" value="胡果" />胡果</td>
            <td style="width: 100px">
                <input id="Text1" type="text" value="ws_hgo" /></td>
            <td style="width: 100px">
                <input id="Button1" type="button" value="button" onclick="Submit(this)" /></td>
        </tr>
         </table>

</body>
</html>

遍歷頁面 text控制代碼

復(fù)制代碼代碼如下:

        function Texts() 
        { 
             //var els= document.getElementsByTagName("*");   //els得到頁面所有控件 
             var els= document.getElementsByTagName("INPUT"); //上面的也可，這樣可以減少循環(huán) 
             var msgs=""; 
             for (var i=0;i<els.length;i++ )  
             { 
                 if (els[i].type == "text" )  
                 { 
                     //取得控件ID 
                     msgs += els[i].id + ","; 
                 } 
             } 
             alert(msgs); 
         }