getUrlParameter

<script>
var getUrlParameter = function getUrlParameter(sParam) {
    var sPageURL = decodeURIComponent(window.location.search.substring(1)),
        sURLVariables = sPageURL.split('&'),
        sParameterName,
        i;

    for (i = 0; i < sURLVariables.length; i++) {
        sParameterName = sURLVariables[i].split('=');

        if (sParameterName[0] === sParam) {
            return sParameterName[1] === undefined ? true : sParameterName[1];
        }
    }
};

var dealeremail = getUrlParameter('email');
var dealername = getUrlParameter('name');  

$(document).ready(function(){
  $('EMAIL_ID').attr('value',dealeremail).attr('readonly',true);
  var emailsubject = dealername;
  $('SUBJECT_ID').attr('value',emailsubject).attr('readonly',true);
  
  $('h1.page-title').html("Contact <strong>"+dealername+"</strong>");
  $('.content h2 strong').text(dealername);
});
</script>