随笔分类 - javascript
摘要:// 判断是不是数字function isNumber(str){ var flag = true; for(i = 0; i < str.length; i++){ var ch = elementValue.charAt(i); if(ch > '9' || ch < '0'){ flag = false; break; } } return flag;}// 判断是否为空function isEmpty(str){ if(str.length == 0){ return true; } return false;}// 对于select,
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摘要:一、对象冒充function Parent(username){ this.username=username; this.sayHello=function(){ alert(this.username); }}function Child(username,password){ //这三行关键代码 this.method=Parent; this.method(username); delete this.method; this.password=password; this.sayWorld=function(){ alert(t...
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摘要:一、可以动态添加对象属性,可以动态删除对象属性<script type="text/javascript"> var object=new Object(); object.username="zhangsan"; alert(object.username); delete object.username; alert(object.username);</script>二、定义对象最常见的方式<script type="text/javascript"> var object={username
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