每天一個JavaScript執行個體-canvas定時器動態更新一個線條，javascript-canvas
<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>每天一個JavaScript執行個體-canvas定時器動態更新一個線條</title><style></style><script>window.onload = function(){var array1 = [[100,100],[150,50],[200,185],[250,185],[300,250],[350,100],[400,250],[450,100],[500,20],[550,80],[600,120]];var array2 = [[100,100],[150,150],[200,135],[250,285],[300,150],[350,150],[400,280],[450,100],[500,120],[550,80],[600,190]];var array3 = [[100,200],[150,100],[200,35],[250,185],[300,10],[350,15],[400,80],[450,100],[500,120],[550,80],[600,120]];var imgcanvas = document.getElementById("imgcanvas");if(imgcanvas.getContext){var ctx = imgcanvas.getContext('2d');//矩形包圍線條表徵圖ctx.strokeRect(0,0,600,300);//第一條線條ctx.beginPath();ctx.moveTo(0,100);for(var i=0;i<array1.length;i++){ctx.lineTo(array1[i][0],array1[i][1]);}ctx.stroke();}setTimeout(function(){ctx.strokeStyle="#f00";//第二條線ctx.beginPath();ctx.moveTo(0,100);for(var i=0;i<array2.length;i++){ctx.lineTo(array2[i][0],array2[i][1]);}ctx.stroke();//第二次延遲setTimeout(function(){ctx.strokeStyle = "0f0";ctx.fillStyle="rgba(255,255,0,.1)";//第三條線ctx.beginPath();ctx.moveTo(0,100);for(var i=0;i<array3.length;i++){ctx.lineTo(array3[i][0],array3[i][1]);}ctx.stroke();},5000);},5000);}</script></head><body><canvas width="650" height="350" id="imgcanvas"><p>img</p></canvas></body></html>
這個只能給canvas添加事件，然後判斷點擊的時候的位置是否和矩形重疊
javascript 的定時器中調用動態語句
那肯定是不行的了，因為你把資料放到js中，和你直接處理，我想花費的時間應該差不多，而且你的資料量那麼大，那一定是很慢的。
用ajax處理是最好的方法了。
每次調用少量的資料，多次處理。
思路是另外做一個產生xml的頁面，把你的資料產生xml格式，通過傳遞的參數（這可以做成類似分頁取資料的方式）來分批取。
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