html - Buttons for text area that change the font size however It only works of text selected by the user (like Microsoft office's font size selections) -

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this code have font size buttons need work on selected text user , not change font size of letters in text area (like microsoft's font size selection in there word documents)

   <select onchange="textarea1.style.fontsize = this.value;" >      <option value="12px" selected="selected">12</option>      <option value="14px">14</option>      <option value="16px">16</option> </select>

put id="textarea1" select

<select id="textarea1" onchange="textarea1.style.fontsize = this.value;" >      <option value="12px" selected="selected">12</option>      <option value="14px">14</option>      <option value="16px">16</option> </select>

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