<input type=button value="<" onclick=go(-1)>
<input id=demo value="press button">
<input type=button value=">" onclick=go(1)>
<script>
function go(n){
demo.focus();
with(document.selection.createRange()){moveStart("character",n);collapse();select();}
}
</script>
<input id=demo value="press button">
<input type=button value=">" onclick=go(1)>
<script>
function go(n){
demo.focus();
with(document.selection.createRange()){moveStart("character",n);collapse();select();}
}
</script>
解决方案 »
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