<script>

function checkInt(o){

  theV=isNaN(parseInt(o.value))?0:parseInt(o.value);

  if(theV!=o.value){o.value=theV;}

  txtTotal.value=txtAmount.value*txtPrice.value;

}

function checkP(o){

  theV=isNaN(parseFloat(o.value))?0:parseFloat(o.value);

  theV=parseInt(theV*100)/100;

  if(theV!=o.value){

    theV=(theV*100).toString();

    theV=theV.substring(0,theV.length-2)+"."+theV.substring(theV.length-2,theV.length)

    o.value=theV;

  }

  txtTotal.value=txtAmount.value*txtPrice.value;

}

</script>

數量:

<input id=txtAmount value=0 onkeyup="checkInt(this);"  onpaste="checkInt(this);"  oncut="checkInt(this);"  ondrop="checkInt(this);"  onchange="checkInt(this);">

單價:

<input id=txtPrice value=0 onkeyup="checkP(this);"  onpaste="checkP(this);"  oncut="checkP(this);"  ondrop="checkP(this);"  onchange="checkP(this);" style="border-right-width:0px;margin-right:0px;">

<input style="border-left-width:0px;margin-left:-4px;width:18px" value="￥" readonly>

總價:

<input id=txtTotal value=0 style="border-right-width:0px;margin-right:0px;" readonly>

<input style="border-left-width:0px;margin-left:-4px;width:18px" value="￥" readonly>