Onfocus of Amount textbox i have to make alert as select Product if Product dropdown is not selected with any value

Question

Hi. Need to do validation in javascript / codebehind (vb.net) onfocus of Amount textbox i have to make alert as select Product if Product dropdown is not selected with any value

Manish Dwivedi · Answer

Hi you can do this like that script type =text/javascript> function check() { if ((document.getElementById( DropDownValue ).selectedIndex)== 0) { alert( Please select the Name! ); return false ; } } script > asp : DropDownList ID =DropDownValue runat =server> asp : ListItem Text =Manish Value =Manish > asp : ListItem > asp : ListItem Text =Gaurav Value =Gaurav> asp : ListItem > asp : ListItem Text =Ravi Value =Ravi> asp : ListItem > asp : DropDownList > asp : TextBox onfocus =Javascript:check(); ID =TextBoxAlert runat =server> asp : TextBox > i think you will get some idea from this solution.

Onfocus of Amount textbox i have to make alert as "select Product" if Product dropdown is not selected with any value