<script language="javascript">
function aa()
{
var a = document.getElementById("a").value;
var b = document.getElementById("b").value;
document.getElementById("c").value = 0.24*parseInt(a)+0.99*parseInt(b)
}
</script>
<form id="form1" name="form1" method="post" action="">
<input type="text" name="a" id="a" />
<input type="text" name="b" id="b" onblur="aa()" />
<input type="text" name="c" id="c" />
</form>
function aa()
{
var a = document.getElementById("a").value;
var b = document.getElementById("b").value;
document.getElementById("c").value = 0.24*parseInt(a)+0.99*parseInt(b)
}
</script>
<form id="form1" name="form1" method="post" action="">
<input type="text" name="a" id="a" />
<input type="text" name="b" id="b" onblur="aa()" />
<input type="text" name="c" id="c" />
</form>
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