if(document.all){
var content = document.selection.createRange();
}else{
var content = window.getSelection();
content.text = content.toString();
}
var str = content.text;//选择的内容
var content = document.selection.createRange();
}else{
var content = window.getSelection();
content.text = content.toString();
}
var str = content.text;//选择的内容
<button onclick="alert(document.selection.createRange().text)">ssss</button>
<input value="dsafsdafweqrqwerwqer" type=text onmouseup=sel()>
<script>
function sel(){
if(document.all){
var content = document.selection.createRange();
}else{
var content = window.getSelection();
content.text = content.toString();
}
var str = content.text;//选择的内容
ss.innerText = str;
}
</script>
<span id=ss></span>