Question

52

How can I concatenate value in HTML and JavaScript?

rated 0 times [ 55] [ 3] / answers: 1 / hits: 15888 / 14 Years ago, mon, february 7, 2011, 12:00:00

For example

<input type=text name=disp>

<input type=button name=but0 value=0 onclick=+calc.disp.value=0+>

Here if I click the button 0 means it should display the 0 in text box. If I click the button it should concatenate in that box. But it replaces that is the code is wrong.

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kurtisl

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answered 14 Years ago tierney · Accepted Answer

As far as I understand it, you want each button click to add 0 to the text box contents. So it starts out empty, and when you push the button the first time, the contents changes to 0. Pushing it a second time changes the contents to 00.

Assuming that's correct, try this:

<input type=text name=disp>

<input type=button name=but0 value=0 onclick=calc.disp.value=calc.disp.value + '0';>