即时计算.txt

C# 是创新性的新式编程语言

1.HTML
		<script language="javascript">
<!--
function getSum()
{
//要保证txt1,txt2是数字
var a = document.all.txt_Price.value;
var b = document.all.txt_Number.value;
var c = eval(a + " * " + b)
document.all.tbTotal.value= c;
}

//-->
		</script>


<asp:textbox id="txt_Price" runat="server" Width="100px">0</asp:textbox>
<asp:textbox id="txt_Number" runat="server" Width="100px">0</asp:textbox>
2.CS


				this.txt_Price.Attributes.Add("onchange","javascript:getSum();");
				this.txt_Number.Attributes.Add("onchange","javascript:getSum();");