insert text to Textbox by calucating another textboxes values use Javascript

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hi, i have few text boxes contains int values and other text box(calculation) which should get the value by doing sum mathematical operation using if else on those few text boxes and present in this calculation text box..

whenever we change values in those text boxes the value should change by itself in calculation text box..

any one can help please

Posted 21-Apr-15 19:23pm

chatarji

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Deepak Kanswal Sharma · Answer 1 · 2015-04-21T20:32:00

       function functn() {
           var a = document.getElementById('text1').value;
           var b = document.getElementById('text2').value;
           if (a == "")
               a = 0;
           if (b == " ")
               b = 0;

           var res = parseInt(a) + parseInt(b);

document.getElementById('text3').value = res;

</script>

<input type="text" value="text1">
<input type="text" value="text2" onblur="functn()" >
<<input type="text" value="text3" ></input>

Style-7 · Answer 2 · 2015-04-21T19:45:00

Solution 1

See onchange Event[^]

Posted 21-Apr-15 19:45pm

Style-7