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1.Îı¾¿ò
1.1 <input type="text" name="test" id="test">
ͨ¹ývar t=document.getElementById("test").value°ÑÖµ¸³¸ø±äÁ¿t,
1.2  µ±È»Ò²¿ÉÒÔ·´¹ýÀ´°ÑÒÑÖªµÄ±äÁ¿Öµ¸³¸øÎı¾¿ò£¬ÀýÈ磺
var m = "5";
document.getElementById("test").value= m;
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2.1 <select name="sel" id="sel" onchange="look();">
<option value="1" >11</option>
<option value="2" selected>22</option>
<option value="3">33</option>
</select>
ͨ¹ývar s=document.getElementById("sel").value»ñÈ¡<select>¿òÖÐÑ¡ÖеÄÖµ£¬´Ë´¦Ä¬ÈÏÑ¡ÖÐvalue="2"µÄÑ¡ÏËùÒÔ¸³¸ø±äÁ¿s µÄÖµÊÇ"2",¶ø²»ÊÇ"22",
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 <script language="javascript">
function look(){
     var se =document.getElementById("sel");  
                 var option=se.getElementsByTagName("option");  
                 var str = "" ;  
                 for(var i=0;i<option.length;++i)  
                 {  
                 if(option[i].selected)  
                 {   
                 document.getElementById("test").value = option[i].text;   
                 }  
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