function showHideBlock(blockID) 
{
    var block = document.getElementById(blockID);
    if (block.style.display == 'none')
        block.style.display = 'block';
    else
        block.style.display = 'none';
}
    
 function selectAll(dropDownListID)
    {
        var chkBoxList = document.getElementById(dropDownListID);
        var chkBoxs= chkBoxList.getElementsByTagName("input");
            
        for(var i=0;i<chkBoxs.length;i++)
            chkBoxs[i].checked = true;
    }
    
// Author: Eric King Url: http://redrival.com/eak/index.shtml
// This script is free to use as long as this info is left in
// Courtesy of SimplytheBest.net - http://simplythebest.net/scripts/
function OpenCenteredPopup(page, name, width, height, scroll)
{
    var leftPosition = (screen.width) ? (screen.width-width)/2 : 0;
    var topPosition = (screen.height) ? (screen.height-height)/2 : 0;
    settings = 'location=no,height='+height+',width='+width+',top='+topPosition+',left='+leftPosition+',scrollbars='+scroll+',resizable';
    window.open(page, name, settings);
}