function modalwin(url,win,width,height,scroll){
	if(!scroll) scroll='no';
	var attr='';
	if(window.showModalDialog){
		attr+= 'dialogWidth:'+(width+5)+'px;';
		attr+= 'dialogHeight:'+(height+25)+'px;';
		attr+= 'center:yes;dialogHide:no;edge:raised;help:no;resizable:no;scroll:no;status:'+scroll+';unadorned:yes'
		window.showModalDialog(url,win,attr);
	}else{
		attr+= 'width='+width+',';
		attr+= 'height='+height+',';
		attr+= 'top='+((screen.height-height)/2)+',';
		attr+= 'left='+((screen.width-width)/2)+',';
		attr+= 'scroll='+scroll+',';
		attr+= 'dependent=yes,';
		attr+= 'chrome=yes,';
		attr+= 'dialog=yes';
		window.open(url,win,attr);
	}
}