function getUrlVars() {
    var vars = [], hash;
    var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');

    for(var i = 0; i < hashes.length; i++) {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
     
    return vars;
}

var hash = getUrlVars();

if (hash['source']==null) {
    //do nothing
} else {
    document.write("<META NAME='WT.srch' CONTENT='1'>");
    document.write("<META NAME='WT.mc_n' CONTENT='" +hash['source']+"'>");
    document.write("<META NAME='WT.mc_id' CONTENT='" +hash['source']+"'>");
    document.write("<META NAME='WT.vr.ipd_se' CONTENT='" +hash['source']+"'>");
}

if (hash['emc']==null){
    //do nothing
} else {
    document.write("<meta name='WT.mc_n' CONTENT='" + hash['emc'] + "'>");
    document.write("<meta name='WT.mc_id' CONTENT='" + hash['emc'] + "'>");
}