function fnreturnTrue(url,arg,width,height)
{
	var arr=OpenDialog(url,arg,width,height);
	if(arr!=null)
	{
		$('cooperation').value+=arr;
	}
}
function OpenDialog(url,arg,width,height)
{
	url.indexOf('?')>0?url=url+'&'+Math.random():url=url+'?'+Math.random()
	var retval=window.showModalDialog(url,arg,'dialogWidth:'+width+'px; dialogHeight:'+height+'px; status:0');
	if(retval!=null&retval!="")
	{
		return retval;
	}
	else
	{
		return null;
	}
}