Yjavascript テスト 新しいページはコチラ
提供: yonewiki
| 9行: | 9行: | ||
function draw1() { | function draw1() { | ||
var canvas = document.getElementById('c1'); | var canvas = document.getElementById('c1'); | ||
| − | if ( ! canvas || ! canvas.getContext ) { return false; } | + | if ((! canvas) ||(! canvas.getContext)) { return false; } |
var ctx = canvas.getContext('2d'); | var ctx = canvas.getContext('2d'); | ||
ctx.beginPath(); | ctx.beginPath(); | ||
