Método para cambiar el valor de atributo Readonly de múltiples entradas a la vez usando JS

复制代码代码如下:

<script>

function dclick1 () {

var txtn = document.getElementsBytagName ("entrada");

para (i = 0; i <txtn.length; i ++) {

if (txtn [i] .type = "text") {

txtn [i] .Readonly = false;

}

}

}

</script>

<input type = "text" id = "contactus1" readonly>

<input type = "text" id = "contactUs2" Readonly>

<input type = "text" id = "contactUs3" Readonly>

<input type = "button" name = "button4" value = "修改" onClick = "doClick1 ();" />