About triggering events

    <!--events can only be triggered by the mouse -    <!--<select onchange= "alert (' Change to page ' + this.value);"         > <option value= "page1.html" ></option> <option value= "page1.html" >page 1</option> <option value= "page2.html" >page 2</option> </select> -    <SelectID= "Theselect">        <!--   -        <optionvalue= "page1.html"></option>        <optionvalue= "page1.html">Page 1</option>        <optionvalue= "page2.html">Page 2</option>    </Select>    <BR>    <inputtype= "button"value= "Click to change Pages"OnClick= "alert (' Change to page ' + document.getElementById (' Theselect ')." value); ">    <!--both mouse and keyboard can be triggered -

<!--can only trigger events via mouse--><!--<select onchange= "alert (' Change to page ' + this.value);" ><option value= "page1.html" ></option><option value= "page1.html" >Page 1</option>< Option value= "page2.html" >page 2</option></select>--
<select id= "Theselect" ><!----><option value= "page1.html" ></option><option value= " Page1.html ">page 1</option><option value=" page2.html ">page 2</option></select><br ><input type= "button" value= "Click to change Pages" onclick= "alert (' Change to page ' + document.getElementById (' Theselect '). Value); " ><!--Mouse, keyboard can be triggered--

About triggering events