<SCRIPT language=javascript>
function moveAtCaret(obj,n){//将obj中光标向dirc方向移动n个字符
obj.focus();
var rng=document.selection.createRange();
rng.moveStart("character", n);
rng.select();
}
</SCRIPT>
<input id =show value="1234567890"><p>
<input type=button value="移动" onclick=moveAtCaret(show,5)>
function moveAtCaret(obj,n){//将obj中光标向dirc方向移动n个字符
obj.focus();
var rng=document.selection.createRange();
rng.moveStart("character", n);
rng.select();
}
</SCRIPT>
<input id =show value="1234567890"><p>
<input type=button value="移动" onclick=moveAtCaret(show,5)>
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