Avoid Text Box OnChange and Button Click Event Conflict

Friends,
I have multiple text box and one Save button on Registration Page.
In All the text box i have onchange event that will call the java script method to validate the control.
On Button click i will call the validation java script function, if all success i will save the data in Database.
The functionality works fine, But when i type something and press the save button directly, The save method called two times and Record saved two time.
Is there any possibility that when click "Save" button i want to avoid "OnChange" method.
Please provide suggestion to avoid two times execution of method.