<input type="text" id="t1" />
<label id="l1">3</label>
<script type="text/javascript">
document.getElementById("t1").onblur = function(){
document.getElementById("l1").innerHTML = parseInt(document.getElementById("t1").value)+parseInt(document.getElementById("l1").innerHTML);
}
</script>
<label id="l1">3</label>
<script type="text/javascript">
document.getElementById("t1").onblur = function(){
document.getElementById("l1").innerHTML = parseInt(document.getElementById("t1").value)+parseInt(document.getElementById("l1").innerHTML);
}
</script>
解决方案 »
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