<script> function $(id){return document.getElementById(id)}; $("source").onclick = function(){ var text = ""; var value = ""; var i = 0; for(i=0; i<this.options.length; i++){ if(this.options[i].selected==true){ text = this.options[i].text; value = this.options[i].value; break; } } this.removeChild(this.options[i]); var oOption = document.createElement("OPTION"); oOption.text = text; oOption.value = value; $("dest").add(oOption); }
$("dest").onclick = function(){ var text = ""; var value = ""; var i = 0; for(i=0; i<this.options.length; i++){ if(this.options[i].selected==true){ text = this.options[i].text; value = this.options[i].value; break; } } this.removeChild(this.options[i]); var oOption = document.createElement("OPTION"); oOption.text = text; oOption.value = value; $("source").add(oOption); } </script> </body> </html>
function $(id){return document.getElementById(id)}; 使用$("param")代替document.getElementById(id)来获取id
script最开始我定义的函数,就是返回id对应的对象。 function $(id){return document.getElementById(id)};
<script> function $(id){return document.getElementById(id)}; $("source").onclick = function(){ if(this.options.length==0){ return; } var text = ""; var value = ""; var i = 0; for(i=0; i<this.options.length; i++){ if(this.options[i].selected==true){ text = this.options[i].text; value = this.options[i].value; break; } } this.removeChild(this.options[i]); var oOption = document.createElement("OPTION"); oOption.text = text; oOption.value = value; $("dest").add(oOption); }
$("dest").onclick = function(){ if(this.options.length==0){ return; } var text = ""; var value = ""; var i = 0; for(i=0; i<this.options.length; i++){ if(this.options[i].selected==true){ text = this.options[i].text; value = this.options[i].value; break; } } this.removeChild(this.options[i]); var oOption = document.createElement("OPTION"); oOption.text = text; oOption.value = value; $("source").add(oOption); } </script> </body> </html>
<html>
<head>
<title>my select</title>
<style>
select{
width: 120px;
height: 120px;
}
</style>
</head>
<body>
<select id="source" multiple="multiple">
<option value="option1">option1</option>
<option value="option2">option2</option>
<option value="option3" selected="selected">option3</option>
<option value="option4">option4</option>
<option value="option5">option5</option>
<option value="option6">option6</option>
</select>
<select id="dest" multiple="multiple"> </select>
<script>
function $(id){return document.getElementById(id)};
$("source").onclick = function(){
var text = "";
var value = "";
var i = 0;
for(i=0; i<this.options.length; i++){
if(this.options[i].selected==true){
text = this.options[i].text;
value = this.options[i].value;
break;
}
}
this.removeChild(this.options[i]);
var oOption = document.createElement("OPTION");
oOption.text = text;
oOption.value = value;
$("dest").add(oOption);
}
$("dest").onclick = function(){
var text = "";
var value = "";
var i = 0;
for(i=0; i<this.options.length; i++){
if(this.options[i].selected==true){
text = this.options[i].text;
value = this.options[i].value;
break;
}
}
this.removeChild(this.options[i]);
var oOption = document.createElement("OPTION");
oOption.text = text;
oOption.value = value;
$("source").add(oOption);
}
</script>
</body>
</html>
使用$("param")代替document.getElementById(id)来获取id
function $(id){return document.getElementById(id)};
<html>
<head>
<title>my select</title>
<style>
select{
width: 120px;
height: 120px;
}
</style>
</head>
<body>
<select id="source" multiple="multiple">
<option value="option1">option1</option>
<option value="option2">option2</option>
<option value="option3" selected="selected">option3</option>
<option value="option4">option4</option>
<option value="option5">option5</option>
<option value="option6">option6</option>
</select>
<select id="dest" multiple="multiple"> </select>
<script>
function $(id){return document.getElementById(id)};
$("source").onclick = function(){
if(this.options.length==0){
return;
}
var text = "";
var value = "";
var i = 0;
for(i=0; i<this.options.length; i++){
if(this.options[i].selected==true){
text = this.options[i].text;
value = this.options[i].value;
break;
}
}
this.removeChild(this.options[i]);
var oOption = document.createElement("OPTION");
oOption.text = text;
oOption.value = value;
$("dest").add(oOption);
}
$("dest").onclick = function(){
if(this.options.length==0){
return;
}
var text = "";
var value = "";
var i = 0;
for(i=0; i<this.options.length; i++){
if(this.options[i].selected==true){
text = this.options[i].text;
value = this.options[i].value;
break;
}
}
this.removeChild(this.options[i]);
var oOption = document.createElement("OPTION");
oOption.text = text;
oOption.value = value;
$("source").add(oOption);
}
</script>
</body>
</html>