function sendemail() {
 var msg = "";
 var to = "mayank.agarwal@rsgmedia.com";
 var subject = 'Invitation request';
 var txtName = document.getElementById("txtName");
 var txtTitle = document.getElementById("txtTitle");
 var txtCompany = document.getElementById("txtCompany");
 var txtWhy = document.getElementById("txtWhy");
 
 if(txtName != null)
  msg = msg +"Name: " + txtName.value + "%0A";
 if(txtTitle != null)
  msg = msg +"Title: " + txtTitle.value + "%0A";
 if(txtCompany != null)
  msg = msg +"Company: " + txtCompany.value + "%0A";
 if(txtWhy != null)
  msg = msg +"Why are you interested in this event: " + txtWhy.value + "%0A";
  
 var url = "mailto:" + to + "?subject=" + subject + "&body=" + msg;
 window.open(url);
}