应该这样写吧

& lt脚本& gt功能？num() {

var？num 1 = document . getelementsbyname(" t1 ")[]。价值；

var？num 2 = document . getelementsbyname(" T2 ")[]。价值；

var？RES = parse int(num 1)+parse int(num 2)；

document . write(RES)；}

</script & gt；

& ltinput type = " text " name = " t1 " value = " " & gt；

& ltinput type = " text " name = " T2 " value = " " & gt；

& lt输入type="button" value= "提交" onclick = " num()；"/& gt；大体就这样吧 自己对比下