I am having three text box t1,t2 and t3. The results of t1+12 has to be shown in t3 when ever i am changing either t1 or t2. I tried doing it by handling text changed event but it works when i take away the focus from either t1 or t2 and secondly it gets focused back to either t1 or t2. How can i do the online changes made to t1 or t2 would reflect in t3 by adding it.

Janamanchi Shrikanth N R

u can try the following.

code behind:
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t1.attributes.add("onkeypress","Calculate(this)");
t2.attributes.add("onkeypress","Calculate(this)");

Javascript:
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function Calculate(obj)
{
   var val1 = document.getElementById("t1").value;
   var val2 = document.getElementById("t2").value;
   var val3 = val1 + val2;
   document.getElementById("t3").value = val3;
}