text: function doShift(id,source){
  	document.getElementById(id).src = source;
  }
  
  function doZoom(id,type){
  	min_W = 210;
  	min_H = 110;
  	n_W = 600;
  	n_H = 300;
  	max_W = 900;
  	max_H = 800;
  	
  	img = document.getElementById(id);
  		curr_W = parseInt(img.width);
  		curr_H = parseInt(img.height);
  		
  	switch (type){
  		case '+':
  			new_W = curr_W+(curr_W*.1);
  			new_H = curr_H+(curr_H*.1);
  			break;
  		case '0':
  			new_W = n_W;
  			new_H = n_H;
  			break;
  		case '-':
  			new_W = curr_W-(curr_W*.1);
  			new_H = curr_H-(curr_H*.1);
  			break;
  	}
  	
  	if((new_W<min_W || new_H<min_H) || (new_W>max_W || new_H>max_H)){
  	}else {
  		img.style.width = new_W;
  		img.style.height = new_H;
  	}
  	
  }