- Go to the Contact Standard Fields settings page from the Global Settings page.
- Select the standard field you want to make mandatory.
- Check off the "Mandatory" checkbox.
- Hit Save.
Alternate method: Create a custom field of type Custom Field Type: Special – Browser Script and place it on the same entity that you'll be using it. For contacts, you'll want to put the custom field in via Global Settings > User & Contact Settings > Contact Custom Fields
function savefunc(frm){
var element=frm.uaddress;
if(element&&element.value.length==0){
alert("Address is empty!");
return false;
}
element=frm.phone;
if(element&&element.value.length==0){
alert("Phone is empty!");
return false;
}
element=frm.ucity;
if(element&&element.value.length==0){
alert("City is empty!");
return false;
}
element=frm.ucountry;
if(element&&(element.value.length==0||element.value=="0")){
alert("Country is empty!");
return false;
}
element=frm.email;
if(element&&element.value.length==0){
alert("Email is empty!");
return false;
}
return true;
}