取得input中部分选中(selected)的值（for IE and Firefox），这个例子非常不错，给大家共享一下。
代码如下
复制代码
function Preview(obj)
{
var TestWin=open('');
TestWin.document.write(obj.value);
}
function copyCode(obj) {
var rng = document.body.createTextRange();
rng.moveToElementText(obj);
rng.scrollIntoView();
rng.select();
rng.execCommand("Copy");
rng.collapse(false);
}
function saveCode(obj) {
var winname = window.open('', '_blank', 'top=10000');
winname.document.open('text/html', 'replace');
winname.document.writeln(obj.value);
winname.document.execCommand('saveas','','homepage..htm');
winname.close();
}
function addBookmark(title,url) {
if (window.sidebar) {
window.sidebar.addPanel(title, url,"");
} else if( document.all ) {
window.external.AddFavorite(url,title);
} else if( window.opera && window.print ) {
return true;
}
}
<script language="javascript">
var agt=navigator.userAgent.toLowerCase();
var ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1) && (agt.indexOf("omniweb") == -1));
function a(){
var myArea = document.getElementById("s");
var selection;
if (!ie){
if (myArea.selectionStart!= undefined) {
selection = myArea.value.substr(myArea.selectionStart, myArea.selectionEnd - myArea.selectionStart);
}
}else{
if (window.getSelection){
selection = window.getSelection();
}else if (document.getSelection){
selection = document.getSelection();
}else if (document.selection){
selection = document.selection.createRange().text;
}
}
alert(selection)
}
</script>
<input type="text" value="testtest" id="s" name="s"
onmouseup="javascript:a()" />
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