validation on phone no

Question

hi guys  i have thee textboxes for contact no.s viz mob.noresidence no office no. and i want that user should enter atleast one no. so how i can apply client side validation on these text boxes using validators or some other way.... thanks in advance

Micke Blomquist · Answer

Hi You could do it with a small JavaScript. Add the onclick attribute to the button in the Page_Load method like this: btnSubmit.Attributes.Add( onclick  return checkTxtBox(); ); Then add the following script to the page or a .js file imported to the page: (Make sure to change the textbox names to your names) script type =text/javascript> function checkTxtBox() { var t1 = document.getElementById( 'txtNo1' ).value; // You could also use var t2 = document.getElementById( 'txtNo2' ).value; var t3 = document.getElementById( 'txtNo3' ).value; if (t1 != '' || t2 != '' || t3 != '' ) { return true ; } else { alert( 'You need to fill in at least on phonenumber...' ); return false ; } } script >

Micke Blomquist · Answer

Please check as answered so others can use the answer as well thanks you!

Jaganathan Bantheswaran · Answer

Hi Write a java script for validations which includes the one which is given by micke for phone no textbox validation here. But make micke's function as a part of code in your javascript validation function. Finally display a model popup with those validation errors on clicking Submit Button .