JavaScript方法和技巧大全2

35 添加网页加载进度窗口

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This is the main page

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JavaScript就这么回事3：图像

 

36 读取图像属性

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2: Width
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37 动态加载图像

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38 简单的图像替换

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7: 8: onMouseOut=”document.myImage.src = defaultImage.src;”>
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39 随机显示图像

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40 函数实现的图像替换

1: 8: imageArray[replacement] = new Image;
9: imageArray[replacement].src = replacementImage;
10: return imageArray;
11: }
12: var rollImage1 = createRollOver(“image1.jpg”,”rollImage1.jpg”);
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14: 15: onMouseOut=”document.myImage1.src = rollImage1[source].src;”>
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41 创建幻灯片

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42 随机广告图片

1:  13: document.write(‘’);
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JavaScript就这么回事4：表单

还是先继续写完JS就这么回事系列吧～
43 表单构成

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4: First Choice
5: Second Choice
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44 访问表单中的文本框内容

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4: Check Text Field

45 动态复制文本框内容

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2: Enter some Text:

3: Copy Text:
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5: 6: document.myForm.myText.value;”>Copy Text Field

46 侦测文本框的变化

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2: Enter some Text:
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47 访问选中的Select

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3: 1
4: 2
5: 3
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8: Check Selection List

48 动态增加Select项

 

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3: 1
4: 2
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49 验证表单字段

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10: Text Field:
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50 验证Select项

1: function checkList(selection) {
2: if (selection.length == 0) {

3: window.alert(“You must make a selection from the list.”);
4: return false;
5: }
6: return true;
7: }

51 动态改变表单的action

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2: Username:

3: PassWord:

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