<script type="text/javascript">
imgar = new Array();
imgar["1"] = new Image(960,380);
imgar["1"].src = 'images/eightimg/eight_1.gif';
imgar["2"] = new Image(960,380);
imgar["2"].src = 'images/eightimg/eight_2.gif';
imgar["3"] = new Image(960,380);
imgar["3"].src = 'images/eightimg/eight_3.gif';
imgar["4"] = new Image(960,380);
imgar["4"].src = 'images/eightimg/eight_4.gif';
imgar["5"] = new Image(960,380);
imgar["5"].src = 'images/eightimg/eight_5.gif';
imgar["6"] = new Image(960,380);
imgar["6"].src = 'images/eightimg/eight_6.gif';
imgar["7"] = new Image(960,380);
imgar["7"].src = 'images/eightimg/eight_7.gif';
imgar["8"] = new Image(960,380);
imgar["8"].src = 'images/eightimg/eight_8.gif';
for(i=1;i<=8;i++){
document.write(imgar["i"].src);
}
</script>
上面这段代码将每个imgar数组中的元素设置为一个image对象,但是无法用数组遍历的方式访问每个对象属性,运行了上面这段代码浏览器不提示错误。但是没有结果显示。
imgar = new Array();
imgar["1"] = new Image(960,380);
imgar["1"].src = 'images/eightimg/eight_1.gif';
imgar["2"] = new Image(960,380);
imgar["2"].src = 'images/eightimg/eight_2.gif';
imgar["3"] = new Image(960,380);
imgar["3"].src = 'images/eightimg/eight_3.gif';
imgar["4"] = new Image(960,380);
imgar["4"].src = 'images/eightimg/eight_4.gif';
imgar["5"] = new Image(960,380);
imgar["5"].src = 'images/eightimg/eight_5.gif';
imgar["6"] = new Image(960,380);
imgar["6"].src = 'images/eightimg/eight_6.gif';
imgar["7"] = new Image(960,380);
imgar["7"].src = 'images/eightimg/eight_7.gif';
imgar["8"] = new Image(960,380);
imgar["8"].src = 'images/eightimg/eight_8.gif';
for(i=1;i<=8;i++){
document.write(imgar["i"].src);
}
</script>
上面这段代码将每个imgar数组中的元素设置为一个image对象,但是无法用数组遍历的方式访问每个对象属性,运行了上面这段代码浏览器不提示错误。但是没有结果显示。
var imgar = new Array();
for(i=1;i++;i<=3){
imgar["'img'+i"] = new Image(960,380);
imgar["'img'+i"].src = "images/eightimg/eight_"+i+".gif";
}
alert(imgar["img1"]);
}
为什么呢?
document.write(imgar[i+""].src);//i是变量,不是字符串"i"
}
for(i=1;i++;i<=3){
imgar["img"+i] = new Image(960,380);//imgar["'img'+i"] = new Image(960,380);
imgar["img"+i].src = "images/eightimg/eight_"+i+".gif";
}
alert(imgar["img1"]);
for(i=1;i++;i<=3){//i=1;i<=3;i++
imgar["'img'+i"] = new Image(960,380);
imgar["'img'+i"].src = "images/eightimg/eight_"+i+".gif";
}
alert(imgar["img1"]);
}//多了
我这里可以运行
var imgar = [];
for(i=0;i<8;i++){
imgar[i] = new Image();
imgar[i].src = "images/eightimg/eight_"+i+".gif";
imgar[i].onload=function(){
this.width = 960;
this.height =380;
}
}
window.onload=function(){
if (!document.images){return;}
}
</script>
var imgar = new Array();
imgar[1] = document.createEelement("<img id='img1' src='images/eightimg/eight_1.gif' height=380 width=960 />");
document.body.appendChild(imgar[1]);
这是IE中createElement的专有写法
function load(){
this.width = 960;
this.height = 380;
}for (var img, imgar = [], i = 1; i < 9; i++) {
img = document.createElement('img');
img.src = 'images/eightimg/eight_' + i + '.gif';
img.onload = load;
imgar.push(img);
}
imgar[i] = new Image();
imgar[i].onload=function(){
this.width = 960;
this.height =380;
}
区别在那里呢?
11楼的我代码我不太懂。