js 在TEXTBOX填写数据后自动传TEXTBOX值

<asp:TextBox ID="txtBuyPriceTotal1" runat="server" Width="60px"  onkeyup ="subTotal1()" ></asp:TextBox>

 

js:

 

function subTotal1()
    {
        var txtBuyPriceTotal1=document.getElementById("txtBuyPriceTotal1").value;
        document.getElementById("Pricesub").value =txtBuyPriceTotal1;
//        document.getElementById("Label1").innerHTML=document.getElementById("Pricesub").value;
    }