var cal15 = new CalendarPopup('calendario'); 
//cal15.showNavigationDropdowns();
cal15.setReturnFunction("setMultipleValues4"); 
function setMultipleValues4(y,m,d) { 
     document.forms[0].year_ini.value=y; 
     document.forms[0].mon_ini.selectedIndex=m-1; 
     for (var i=0; i<document.forms[0].day_ini.options.length; i++) { 
          if (document.forms[0].day_ini.options[i].value==d) { 
               document.forms[0].day_ini.selectedIndex=i; 
               } 
          } 
     } 
var cal16 = new CalendarPopup('calendario'); 
//cal16.showNavigationDropdowns();
cal16.setReturnFunction("setMultipleValues5"); 
function setMultipleValues5(y,m,d) { 
     document.forms[0].year_end.value=y; 
     document.forms[0].mon_end.selectedIndex=m-1; 
     for (var i=0; i<document.forms[0].day_end.options.length; i++) { 
          if (document.forms[0].day_end.options[i].value==d) { 
               document.forms[0].day_end.selectedIndex=i; 
               } 
          } 
     } 
function getDateString(y_obj,m_obj,d_obj) { 
     var y = y_obj.options[y_obj.selectedIndex].value; 
     var m = m_obj.options[m_obj.selectedIndex].value; 
     var d = d_obj.options[d_obj.selectedIndex].value; 
     if (y=="" || m=="") { return null; } 
     if (d=="") { d=1; } 
     return str= y+'-'+m+'-'+d; 
     }