<form action="dorukui.jsp" method="get">
<input type="text" name="cont1" />
<input type="text" name="cont2" />
<input type="text" name="cont3" />
<input type="submit" name="Submit" value="提交" />
<input name="Submit2" type="reset" value="重置" />
</form>
比如我在count1 输入22 count输入22那么在count3就自动显示22x22=484
<input type="text" name="cont1" />
<input type="text" name="cont2" />
<input type="text" name="cont3" />
<input type="submit" name="Submit" value="提交" />
<input name="Submit2" type="reset" value="重置" />
</form>
比如我在count1 输入22 count输入22那么在count3就自动显示22x22=484
{
document.all["cont3"].value = parseFloat(document.all["cont1"].value) +parseFloat(document.all["cont2"].value)
return false;
}
function Calcute()
{
var a = document.getElementById("cont1");
var b = document.getElementById("cont2");
var c = document.getElementById("cont3");
if(a != undefined && b != undefined && c != undefined)
{
if(isNaN(parseFloat(a.value)) || isNaN(parseFloat(b.value)))
{
c.value = "请输入数字";
}
else
{
c.value = ((a.value==undefined)?0:a.value)*((b.value==undefined)?0:b.value);
}
}
else
{
return false;
}
}
</script>
<html>
<input type="text" name="cont1" onkeyup="Calcute()"/>
<input type="text" name="cont2" onkeyup="Calcute()"/>
<input type="text" name="cont3" />
</html>