var i, n, ns4, ie5, ng5, ctrlKey;
ctrlKey = 0;
ns4 = (document.layers) ? true:false;
ie4 = (document.all) ? true:false;
ng5 = (document.getElementById) ? true:false;

function captureCtrl()
{
if (event.key==39) event.returnValue = false;
if ((event.keyCode==67 || event.keyCode==88 ) && event.ctrlKey)
event.returnValue = false;
}
document.oncontextmenu=new Function("return false")
function validate_email(x)
{
    var filter=/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/ ;
    if (filter.test(x.value))
    {
        return true;
    }
        alert ("Please enter a valid Email Address");
        x.focus();
        return false;
}