var bNames='home_tab_01 home_tab_02 home_tab_03 home_tab_04 home_tab_05 home_tab_06 home_tab_07'.split(' ');

var path='images/', btn=new Array(); 
var path='images/', mimg=new Array(); 

function Button(name){ 
	this.on=new Image(); 
	this.on.src=path+name+'_on.gif'; 
	this.off=new Image(); 
	this.off.src=path+name+'_off.gif';
} 

function MainImg(name){ 
	this.on=new Image(); 
	this.on.src=path+name+'.jpg'; 
	this.off=new Image(); 
	this.off.src=path+name+'.jpg';
} 

for (i=0; i<bNames.length; i++) {
 btn[bNames[i]]=new Button(bNames[i]); 
 mimg[bNames[i]]=new MainImg(bNames[i])
}



function rollOn(name, id){ 
	document[name].src=btn[name].on.src;
	document.images.home_image.src=mimg[name].on.src;
} 

function rollOff(name, id) { 
	document[name].src=btn[name].off.src;
	document.images.home_image.src= 'images/home_tab_01.jpg';
}