How to call a Java Script Method – 2

Writing JavaScript in HTML and Calling it from Code behind.

<script type ="text/javascript" language="javascript">
        function myFunction(str) 
        {
            alert(str);
        }
    </script>

1) Without Using RegisterStartupScript In Code behind

protected void Page_Load(object sender, EventArgs e)
 {
   Button2.Attributes.Add
   ("onclick", "javascript:myFunction('from code behind');");
 }

2) Using RegisterStartupScript in Code Behind

protected void Button3_Click(object sender, EventArgs e)
{
 Page.ClientScript.RegisterStartupScript
 (typeof(testJavaScript), "alert",
 "<script language='javascript'>myFunction('" + TextBox1.Text + "');</script>");
}

*Using RegisterStartupScript we can call javascript from code behind.