function browser_check_zm() 
{
	this.ns4 = (document.layers) ? true : false
	this.ns6 = (document.getElementById && !document.all) ? true : false

	this.ie = (document.all) ? true : false
	this.ie4 = (document.all && !document.getElementById) ? true : false
	this.ie5 = (document.all && document.getElementById) ? true : false

	this.dom = (document.getElementById) ? true : false
}

is = new browser_check_zm()

if (!(is.ie4 || is.dom)) window.location.href = '/no_support.htm'