/*navbar*/
var navbtnover=""
var navbtntab=""
var navbtnimg=""

function nav_roll_over(base,aa){
	if (base!=navbtnover){
		var obj=document.getElementById(base);
		obj.src=aa;
	}
}

function nav_roll_out(base,aa){
	if (base!=navbtnover){
		var obj=document.getElementById(base);
		obj.src=aa;
	}
}

function nav_change_img(base,aa){
	navbtnover=base;
	var obj=document.getElementById(base);
	obj.src=aa;
	navbtntab=base;
	navbtnimg=aa;
}


/*textnavbar*/

function text_nav_class(base,aa){
	var obj=document.getElementById(base);
	obj.className=aa;
}


function checkpage(){
		var tempURL=new String(document.URL)
		var load_first_string=tempURL.split("?")
		//Return a array
		var alertfirst=load_first_string[1];
		var alertsecond=load_first_string[2];
				
		switch (alertfirst){
			case "home": 
				navbtnimg="images/home_d.gif";
				break;
			case "aboutus": 
				navbtnimg="images/aboutus_c.gif";
				break;
			default: 
				break
		}		
}

//document.onload=checkpage()