function G(e){return document.getElementById(e)}
</script>
单价:<input type="text" id="p" name="price" onkeyup="this.value=this.value.replace(/[^0-9\.]/g,'')" onblur="G('total').value = this.value / 0.9"/>
金额:<input type="text" id="total" name="total" />
输入完单价,点金额的输入框就好~~
function(a,b){var c = 0.00
if(b != 0){
c = (a/b).toFixed(2)
}
return c
}