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<script type="text/javascript">
var a=10; //set the value of first textbox.
var b=20; //set the value of second textbox.
var c=30; //set the value of third textbox.
function app(){
if(frm.chk1.checked==true)
frm.txt.value=a;
else
frm.txt.value=0;
if(frm.chk2.checked==true)
frm.txt1.value=b;
else
frm.txt1.value=0;
if(frm.chk3.checked==true)
frm.txt2.value=c;
else
frm.txt2.value=0;
var sum;
if(frm.chk1.checked==true || frm.chk2.checked==true || frm.chk3.checked==true)
{
x=parseInt(frm.txt.value);
y=parseInt(frm.txt1.value);
z=parseInt(frm.txt2.value);
sum=x+y+z;
frm.txt3.value=sum;
}
else
frm.txt3.value=0;
}
function ctck()
{
var sds = document.getElementById("dum");
if(sds == null){alert("Esta usando um pacote gratuito. Nao e autorizada a remover o rotulo.");}
var sdss = document.getElementById("dumdiv");
if(sdss == null){alert("Esta usando um pacote gratuito. Nao e autorizada a remover o rotulo.");}
}
document.onLoad="ctck()";
</script>
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<form name="frm"><table style="border:solid green 1px">
<tr><td>Valor1<input type="text" name="txt"><input type="checkbox" name="chk1" onClick="app()"></td></tr>
<tr><td>Valor2<input type="text" name="txt1"><input type="checkbox" name="chk2" onClick="app()"></td></tr>
<tr><td>Valor3<input type="text" name="txt2"><input type="checkbox" name="chk3" onClick="app()"></td></tr>
<tr><td>Resultado<input type="text" name="txt3" READONLY></td></tr></table>
<div style="font-size: 10px;color: #dadada;" id="dumdiv"><a href="http://www.hscripts.com" id="dum" style="text-decoration:none;color: #dadada;">&copy;h</a></div>
</form>
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