for(var i=1; i<=3; i++){
(document.getElementById('answer'+i).onclick = function(){selAnswer(i);})(i);
// document.getElementById('answer'+i).onclick = function(event) {alert(event.currentTarget);};
} // document.getElementById('answer1').onclick = function() { selAnswer(1); };
// document.getElementById('answer2').onclick = function() { selAnswer(2); };
// document.getElementById('answer3').onclick = function() { selAnswer(3); };如何用for循环输出下面注释的内容
(document.getElementById('answer'+i).onclick = function(){selAnswer(i);})(i);
// document.getElementById('answer'+i).onclick = function(event) {alert(event.currentTarget);};
} // document.getElementById('answer1').onclick = function() { selAnswer(1); };
// document.getElementById('answer2').onclick = function() { selAnswer(2); };
// document.getElementById('answer3').onclick = function() { selAnswer(3); };如何用for循环输出下面注释的内容
<input id='btn2' value='btn2' type='button'>
<input id='btn3' value='btn3' type='button'>
<script>
for(i = 1; i < 4; i++){
document.getElementById('btn' + i).addEventListener('click', (function (i) {
return function (e){
alert('btn' + i);
}
})(i), 'false');
}
</script>
<input id='btn1' value='btn1' type='button'>
<input id='btn2' value='btn2' type='button'>
<input id='btn3' value='btn3' type='button'>
<script>
for(i = 1; i < 4; i++){ (function(i){ //这个是function里i,即function的形参,也可以换成j,换成什么变量名都无所谓
document.getElementById('btn' + i).onclick=function(){
selAnswer(i);
}
})(i);
}
function selAnswer(i){
alert(i);
}
</script>