function validate1() {

   dml=document.forms['invitefriend'];
   // get the number of elements from the document
   len = dml.elements.length;
   for( i=0 ; i<len ; i++)
    {
							
   if (dml.elements[i].id=='yemail[]')
   {
      // if exists do the validation and set the focus to the textbox
      if (dml.elements[i].value=="")
       {
         alert("Please enter all the email address");
         dml.elements[i].focus();
         return false;                       
       }
    }
	
   if (dml.elements[i].id=='femail[]')
   {
      // if exists do the validation and set the focus to the textbox
      if (dml.elements[i].value=="")
       {
         alert("Please enter all the email address");
         dml.elements[i].focus();
         return false;                       
       }
    }
                               
   }
  return true;
 }