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help with javascript? Answered

Hello, i just want to know how to change a variable's value permanently in a java script file using an input field. like i created a variable: Now the script displays you have 20 cars then i want to change that number-of-cars variable while staying on the page it means i want to modify the file and change the number of cars in that variable through an input box! Please help me with this!


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Best Answer 6 years ago

Your description of the problem needs clarification.
What variable? Javascript variable? Or backend/database? Or HTML output?

For javascript variable could use onchange event of the input field http://www.w3schools.com/jsref/event_onchange.asp

That assigns a new value any time a character is typed into or deleted from the input box.


6 years ago

To change the size (lenght) of an input field you need to change the HTML (see:

http://www.w3schools.com/tags/att_input_size.asp ). Though it is possible to do with CSS (cascading style sheets) or dynamically with Javascript - The easy way if you are a beginner would be to set it in HTML - You can alsways do it in a different way when/if you get more comfortable with the languages you use.

And here is a discussion on how to get the value of the input field into a variable in javascript: http://stackoverflow.com/questions/3547035/javascr...