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input輸入框 (只能輸入正整數)

<input type="number" class="form-control" id="inoutnum" name="inoutnum" value='{$ITEM->inoutnum}' min="0" placeholder="請輸入數量..." 
onkeyup="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'')}else{this.value=this.value.replace(/\D/g,'')}"
onafterpaste="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'
0')}else{this.value=this.value.replace(/\D/g,'')}"
>