JavaScript中类的学习，从基本类继承过来方法
也可以这样实现：
Java代码
| function newClass(){ this.firstName="frank"; this.toUc=String.toUpperCase; this.toString=function(){ return this.toUc(this.firstName); } } var nc=new newClass(); alert(nc);//在IE中没反应。 function newClass(){ this.firstName="frank"; this.toUc=String.toUpperCase; this.toString=function(){ return this.toUc(this.firstName); } } var nc=new newClass(); alert(nc);//在IE中没反应。 |
一个简单的客户端验证
Java代码
| <html> <head> <title>javascript</title> <script type="text/javascript"> function doSubmit(inForm){ if(inForm.firstName.value==""){ alert("firstName is null"); return false; } if(inForm.lastName.value ==""){ alert("lastName is null"); } inForm.submit(); return true; } </script> </head> <body> <form action="#" name="test" method="post"> First name: <input type="text" name="firstName"> <br> Last name:<input type="text" name="lastName"> <br> <input type="button" value="submit" onclick="doSubmit(this.form);"> </form> </body> </html> </form> <html> <head> <title>javascript</title> <script type="text/javascript"> function doSubmit(inForm){ if(inForm.firstName.value==""){ alert("firstName is null"); return false; } if(inForm.lastName.value ==""){ alert("lastName is null"); } inForm.submit(); return true; } </script> </head> <body> <form action="#" name="test" method="post"> First name: <input type="text" name="firstName"> <br> Last name:<input type="text" name="lastName"> <br> <input type="button" value="submit" onclick="doSubmit(this.form);"> </form> </body> </html> </form> |
一般这样写
Java代码
<form action="#" name="test" method="post" onSubmit="return doSubmit(this);"> |
