如何比较Javascript中的两个Textbox客户端ID?

问题描述：

大家好，

我想比较两个文本框的ClientId，而不是它们的值，无论clientid等于i，还是不执行其他操作.

Hi to All,

I want to Compare the Two Textbox ClientId, not a Value of them, whether clientid is equals to i, perform something oterwise not.

for (var i = 2; i <= document.getElementById('ctl00_cphMaster_grdPaymentAmount').rows.length - 1; i++)
{
     if(document.getElementById('ctl00_chMaster_ctl04_txtPayAmount') == document.getElementById('ctl00_chMaster_ctl0' + i +'_txtPayAmount'))
     alert("Some");
}

因为我将文本框绑定到gridview，所以文本框的值与以前的值完全不同.

但是if语句匹配所有循环增量.

我该怎么办?

请帮帮我.

非常感谢.

because I bind the textbox into gridview, so the value of the textbox is entirely different to previous value.

but the if statement match all loop increment.

How can i do this?

Please Help me.

Thanks a lot.

答

您是否要测试控件是否存在，以便可以执行操作?如果是这样，请尝试这样的事情...

Are you trying to test to see if a control exists so you can perform an action if it does? If so try something like this...

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
    <head>
        <title>test</title>
    </head>
    <body>

    <span id="ctl00_chMaster_ctl04_txtPayAmount">my control text</span>

    <script type="text/javascript">

        // the fourth loop should return true all others should return false
        for(var i =1;i <= 5;i++){

            if(document.getElementById("ctl00_chMaster_ctl0" + i + "_txtPayAmount") != null){

                window.alert(true);

            }

            else {

                window.alert(false)

            }

        }



    </script>
    </body>
</html>

如何比较Javascript中的两个Textbox客户端ID?

相关推荐