<!DOCTYPE html> <html lang="ja-JP"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,user-scalable=yes,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.5"> <title></title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <script> function changeAttr(){ document.getElementsByTagName("img")[0].attributes[0].value = "img/after.png"; //下の記述でも可 //document.getElementsByTagName("img")[0].setAttribute("src","img/after.png"); } </script> </head> <body> <img src="img/before.png"> <input type="button" value="変更" onclick="changeAttr();"> </body> </html>
<!DOCTYPE html> <html lang="ja-JP"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,user-scalable=yes,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.5"> <title></title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <script> window.onload = function(){ document.getElementsByTagName("input")[0].onclick = function(){ document.getElementsByTagName("img")[0].attributes[0].value = "img/after.png"; //下の記述でも可 //document.getElementsByTagName("img")[0].setAttribute("src","img/after.png"); } } </script> </head> <body> <img src="img/before.png"> <input type="button" value="変更"> </body> </html>
<!DOCTYPE html> <html lang="ja-JP"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,user-scalable=yes,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.5"> <title></title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <script> window.addEventListener("load",function(){ document.getElementsByTagName("input")[0].addEventListener("click",function(){ document.getElementsByTagName("img")[0].attributes[0].value = "img/after.png"; //下の記述でも可 //document.getElementsByTagName("img")[0].setAttribute("src","img/after.png"); }); }); </script> </head> <body> <img src="img/before.png"> <input type="button" value="変更"> </body> </html>
<!DOCTYPE html> <html lang="ja-JP"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,user-scalable=yes,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.5"> <title></title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <script> $(function(){ $("input").click(function(){ $("img").attr("src","img/after.png"); }); }); </script> </head> <body> <img src="img/before.png"> <input type="button" value="変更"> </body> </html>