function tandc() {
    window.open('tc.html','tc','left=20,top=20,width=740,height=500,toolbar=0,resizable=0,scrollbars=1,location=0,status=0');
}
function makeRequest(url,div) {
    var http_request = false;

    if (window.XMLHttpRequest) { // Mozilla, Safari, ...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');
        }
    } else if (window.ActiveXObject) { // IE
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }

    if (!http_request) {
        alert('Giving up :( Cannot create an XMLHTTP instance');
        return false;
    }
    http_request.onreadystatechange = function() { update_page(http_request,div,url); };
    http_request.open('GET', url, true);
    http_request.send(null);

}

function update_page(http_request,div,url) {
    if (http_request.readyState == 4) {
        if (http_request.status == 200) {
            document.getElementById(div).innerHTML=http_request.responseText;
        } else {
            alert('There was a problem with the request.');
        }
    }
}


function echeck(str) {

        var at="@"
        var dot="."
        var lat=str.indexOf(at)
        var lstr=str.length
        var ldot=str.indexOf(dot)
        if (str.indexOf(at)==-1){
           alert("Invalid E-mail Address")
           return false
        }

        if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
           alert("Invalid E-mail Address")
           return false
        }

        if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
            alert("Invalid E-mail Address")
            return false
        }

         if (str.indexOf(at,(lat+1))!=-1){
            alert("Invalid E-mail Address")
            return false
         }

         if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
            alert("Invalid E-mail Address")
            return false
         }

         if (str.indexOf(dot,(lat+2))==-1){
            alert("Invalid E-mail Address")
            return false
         }
         if (str.indexOf(" ")!=-1){
            alert("Invalid E-mail Address")
            return false
         }

         return true
}