function printpreview()
{
	document.getElementById('topinc').style.display='none';
	document.getElementById('bottominc').style.display='none';
	document.getElementById('side').style.display='none';	
	document.getElementById('pv').style.display='none';	
	document.getElementById('printview').style.display='';		
	document.styleSheets[0].disabled=false;
	document.styleSheets[1].disabled=true;	
}
function originalview()
{
	document.getElementById('topinc').style.display='';
	document.getElementById('bottominc').style.display='';
	document.getElementById('side').style.display='';		
	document.getElementById('pv').style.display='';	
	document.getElementById('printview').style.display='none';	
	document.styleSheets[0].disabled=true;
	document.styleSheets[1].disabled=false;			
	
}