function start()
{
	detectBrowser();
	MM_preloadImages('gfx/tab50.gif','gfx/tab50over.gif','gfx/tab75.gif','gfx/tab75over.gif','gfx/tab90.gif','gfx/tab90over.gif');
	newImage();
}

function detectBrowser()
{
        var browser=navigator.appName
        var b_version=navigator.appVersion
        var version=parseFloat(b_version)
        if ( (browser!="Netscape"||browser!="Microsoft Internet Explorer") && (version<4) )
		{
			alert("Your brower requires upgrading to view this site completely!")
		}
}

function MM_preloadImages() 
{
	var d=document;
	if(d.images)
	{
		if(!d.MM_p) d.MM_p=new Array();
		var i,j=d.MM_p.length,a=MM_preloadImages.arguments;
		for(i=0; i<a.length; i++)
		if (a[i].indexOf("#")!=0)
		{
			d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];
		}
	}
}

MyImages=new Array();
MyImages[0]='gfx/home1.jpg';
MyImages[1]='gfx/home2.jpg';
MyImages[2]='gfx/home3.jpg';
MyImages[3]='gfx/home4.jpg';

function newImage()
{
    document.getElementById("mainImage").setAttribute("src", MyImages[Math.round(Math.random()*3)])
}