select标签如何传递选中option的value值与text值

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<select name="type" onchange="show_sub(this.options[this.options.selectedIndex].value)">    
    <option value="0">请选择主菜名</option>    
    <option value="1">白菜</option>    
    <option value="2">萝卜</option>    
 </select> 

<select name="type" onchange="show_sub(this.options[this.options.selectedIndex].text)">    
    <option value="0">请选择主菜名</option>    
    <option value="1">白菜</option>    
    <option value="2">萝卜</option>    
 </select> 


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转载自blog.csdn.net/guo147369/article/details/79449707