fieldDecoration.xml

<?xml version="1.0" encoding="windows-1252" ?>  
<j:jelly trim="false" xmlns:j="jelly:core" xmlns:g="glide" xmlns:j2="null" xmlns:g2="null">  
<j:set var="jvar_n" value="place_call:${ref}"/>  
<a id="${jvar_n}" onclick="placeCallString('${ref}')"  name="${jvar_n}">  
    <img border="0" src="images/icons/phone.gifx" title="Place Call" alt="Place Call"/>  
</a>  
<script>  
function placeCallString(reference) {  
 alert('You pushed the button.');  
 var phoneNumber = g_form.getValue(reference.split('.')[1]);  
 alert(phoneNumber);  
 if(phoneNumber =='')  
  alert('This field is empty.');  
 else  
  window.open('callto:' + phoneNumber,'_call');  
}   
</script>  
</j:jelly>  



<?xml version="1.0" encoding="utf-8" ?>
<j:jelly trim="false" xmlns:j="jelly:core" xmlns:g="glide" xmlns:j2="null" xmlns:g2="null">
<g:evaluate var="jvar_guid" expression="gs.generateGUID(this);"/>
<j:set var="jvar_n" value="show_lync_${jvar_guid}:${ref}"/>
<a class="ref-button btn btn-default btn-ref" style="padding:5px 6px 7px;" id="${jvar_n}" onclick="invokeCall('${ref}');">  
  <img border="0" src="/lync_call.gifx" title="${gs.getMessage('Lync Call')}"/>  
</a> 	
<script>
function invokeCall(reference) {
var tck = g_form.getValue('number');
if(tck.indexOf('INC') >= 0){
 var url = 'tel:+1' + g_form.getReference('caller_id').phone;
}
else{
var url = 'tel:+1' + g_form.getReference('u_user').phone;
}
var w = getTopWindow();
w.open(url, '_self');

}
</script>
</j:jelly>