js判断select列表并同时传值到input的text文本框中

by Fed json

HTML

<form name="form1"> 
<select name="menu1" onChange="document.form1.get.value=this.options[this.selectedIndex].value;if(this.options[this.selectedIndex].value == '请选择'){document.form1.get.value='';}"> 
<option selected>请选择</option> 
<option value="百度">百度</option> 
<option value="网易">网易</option> 
<input type="text" value="" name="get" id="get"> 
</form>