var pop='';
function openwin(nm,width,height,w_per,h_per)
{
	var name=nm;
	var screen_h=window.screen.height;
	var screen_w=window.screen.width;
	var x_cor=parseInt((80/100)*screen_w);
	var y_cor=parseInt((80/100)*screen_h);
if (pop && !pop.closed)
			pop.close();
	
	pop=eval("window.open('"+name+"','NewWIN','toolbar=no,scrollbars=yes,width='+width+',height='+height+'left=100,top=100')");

if(window.focus)
		pop.focus();
}