function changeMainScale(){
    
    var WinCanvas = document.getElementById("SilverlightPlugIn");
    var txt = document.getElementById("cmbZoom");    
    WinCanvas.content.findName("mainScale").ScaleX = txt.value / 100;     
    WinCanvas.content.findName("mainScale").ScaleY = txt.value / 100;     
    
    WinCanvas.width  = 1000 * txt.value / 100;
	WinCanvas.height = 900 * txt.value / 100;
   
}

function showZones(sender, e){
    allHide();
    var WinCanvas = document.getElementById("SilverlightPlugIn");
    WinCanvas.content.findName(sender.Tag).visibility = "Visible";     
    WinCanvas.content.findName(sender.Tag).visibility = "Visible";     
}

function allHide()
{
    var WinCanvas = document.getElementById("SilverlightPlugIn");
    WinCanvas.content.findName("ZONES1-5").visibility = "Collapsed";     
    WinCanvas.content.findName("ZONES6-10").visibility = "Collapsed";     
    WinCanvas.content.findName("ZONES11-15").visibility = "Collapsed";     
    WinCanvas.content.findName("ZONES16-20").visibility = "Collapsed";     
    WinCanvas.content.findName("ZONES21-25").visibility = "Collapsed";     
    WinCanvas.content.findName("ZONES26-31").visibility = "Collapsed";         
}

function showLines()
{
    var txt = document.getElementById("chkLines");    
    var WinCanvas = document.getElementById("SilverlightPlugIn");    
    if (txt.checked == true){        
        WinCanvas.content.findName("baseImageSrc").source = "images/BaseImageLines.jpg";                 
    }else{        
        WinCanvas.content.findName("baseImageSrc").source = "images/BaseImage.jpg";                 
    }
}