function ShowPrintPage(pagename) 
{
   /** var url = document.location.href+'?mode=print';
    var printWin = window.open(url, "PrintPage", "scrollbars=1,address=0,width=750,height=700");
    if (window.focus) {printWin.focus();} 
    printWin.print(); **/
    window.print();
}

function openWindow(source,name,left,top,width,height)
{
    window.open(source,name,'menubar=no,scrollbars=no,toolbar=no,location=no,status=no,left='+ left +',top='+ top +',width=' + width + ',height=' + height);
}

function HideControl(dropdownControl, buttonID)
{
     var ControlName = document.getElementById(dropdownControl.id);
    
     if(ControlName.value == '-1')  //it depends on which value Selection do u want to hide or show your textbox 
     {
         document.getElementById('ctl00_MainContent_DropDownButton').style.display = 'none';
       
     }
     else
     {
         document.getElementById('ctl00_MainContent_DropDownButton').style.display = '';
        
     }
}