<!DOCTYPE html><html><head><meta charset="utf-8" /><title></title><script type="text/javascript"> window.onload = function(){ var btn = document.getElementById("btn"); btn.onclick = function(){ var arrays = new Array(); var items = document.getElementsByTagName("check"); for(i=0; i<items.length; i++) { if(items[i].checked){ arrays.push(items[i].value); } } alert("選中的個(gè)數(shù)："+arrays.length) } }</script></head><body><input type="checkbox" value="1" name="check" checked="checked" /><input type="checkbox" value="2" name="check" /><input type="checkbox" value="3" name="check" checked="checked" /><input type="button" value="你選中的個(gè)數(shù)" id="btn" /></body></html>
為什么選中的個(gè)數(shù)是0呢？
喵喵時(shí)光機(jī)
2018-12-13 23:19:54
