how to validat DropDownList Box using javascript in asp.net (for client side...

[sunsetorange]

...validation)? How to validate the user selected value or not in drop down list box , if not an alert message should display.

[jokeyxero]

Please never use this way to reference an element:document . forms['myform'] . elements['myselect']Please use the standard way:document. getElementById("myselect")The first answer is correct otherwise.if ( document. getElementById("myselect"). selectedIndex < 0 ) { alert( "Please select an option." ); }