我想在html中使用addeventlistener而不是onkeyup

Question

<center><h14>for typing help<a href="help.html"> click here</a></h14></center>

<td valign="top"><center>


//in this line I want to use addEvent instead of onkeyup

<textarea id="ta_in" rows="7" cols="42" onkeyup="get_ml()"></textarea>

<br>

<textarea id="ta_out" rows=7" cols="42"></textarea></center>

</td>

Answer 1

function get_ml(){
    alert('in');    
}

var el = document.getElementById('ta_in'); 

if (typeof el.addEventListener != "undefined") {
    el.addEventListener("keyup", function(evt) {
        get_ml();
    }, false);
} else if (typeof el.attachEvent != "undefined") { //incase you support IE8
    el.attachEvent("onkeyup", function(evt) {
        get_ml();
    });
}

<textarea id="ta_in" rows="7" cols="42" onkeyup="get_ml()"></textarea>