function MakeEnquiry()
{
    DarkenPage();
    ShowEnquiryPanel();
}

function ShowEnquiryPanel()
{
    var enquiry_panel = document.getElementById('enquiry_panel');
    
    // enquiry panel width
    w = 450;
    // enquiry panel height
    h = 300;
    
    xc = Math.round((document.body.clientWidth/2)-(w/2))
    yc = 65
    
    enquiry_panel.style.left = xc + "px";
    enquiry_panel.style.top  = yc + "px";
    enquiry_panel.style.display = 'block';
}

function SendEnquiry()
{
    var enquiry_panel = document.getElementById('enquiry_panel');
    enquiry_panel.style.display = 'none';
	
    LightenPage();
}

function DarkenPage()
{
    var page_screen = document.getElementById('page_screen');
    page_screen.style.height = document.body.parentNode.scrollHeight + 'px';
    page_screen.style.width = document.body.parentNode.scrollWidth + 'px';
    page_screen.style.display = 'block';
}

function LightenPage()
{
    var page_screen = document.getElementById('page_screen');
    page_screen.style.display = 'none';
}